2019
|
Chin, Ting Wei; Leader, Mark L; Kennedy, Graeme J A Scalable Framework for Large-Scale 3D Multimaterial Topology Optimization with Octree-based Mesh Adaptation Journal Article Advances in Engineering Software, 135 , 2019. Links | BibTeX @article{Chin:2019:TMR-paper,
title = {A Scalable Framework for Large-Scale 3D Multimaterial Topology Optimization with Octree-based Mesh Adaptation},
author = {Ting Wei Chin and Mark L Leader and Graeme J Kennedy},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2019/07/Chin_etal_2019_Multimaterial_octree_adapt_compressed.pdf},
doi = { https://doi.org/10.1016/j.advengsoft.2019.05.004},
year = {2019},
date = {2019-09-01},
journal = {Advances in Engineering Software},
volume = {135},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Brooks, Timothy R; Martins, Joaquim R R A; Kennedy, Graeme J High-fidelity aerostructural optimization of tow-steered composite wings Journal Article Journal of Fluids and Structures, 88 , pp. 122-147, 2019. Links | BibTeX @article{Brooks:2019:Tow-steered,
title = {High-fidelity aerostructural optimization of tow-steered composite wings},
author = {Timothy R. Brooks and Joaquim R. R. A. Martins and Graeme J. Kennedy},
url = {https://www.sciencedirect.com/science/article/pii/S0889974618306340},
doi = {10.1016/j.jfluidstructs.2019.04.005},
year = {2019},
date = {2019-07-01},
journal = {Journal of Fluids and Structures},
volume = {88},
pages = {122-147},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Kiviaho, Jan; Kennedy, Graeme J Efficient and Robust Load and Displacement Transfer Scheme Using Weighted Least-Squares Journal Article AIAA Journal, 57 (5), 2019. Links | BibTeX @article{Kiviaho:2019:MELD,
title = {Efficient and Robust Load and Displacement Transfer Scheme Using Weighted Least-Squares},
author = {Jan Kiviaho and Graeme J. Kennedy},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2019/03/technical_note.pdf},
doi = {10.2514/1.J057318},
year = {2019},
date = {2019-05-01},
journal = {AIAA Journal},
volume = {57},
number = {5},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Jacobson, Kevin E; Kiviaho, Jan F; Kennedy, Graeme J; Smith, Marilyn J Evaluation of Time-domain Damping Identification Methods for Flutter-constrained Optimization Journal Article Journal of Fluids and Structures, 87 , pp. 174-188, 2019. Links | BibTeX @article{Jacobson:2019:Flutter,
title = {Evaluation of Time-domain Damping Identification Methods for Flutter-constrained Optimization},
author = {Kevin E. Jacobson and Jan F. Kiviaho and Graeme J. Kennedy and Marilyn J. Smith},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2019/03/Jacobsonetal_JFS_10-2018.pdf},
doi = {10.1016/j.jfluidstructs.2019.03.011},
year = {2019},
date = {2019-05-01},
journal = {Journal of Fluids and Structures},
volume = {87},
pages = {174-188},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Kiviaho, Jan F; Jacobson, Kevin E; Kennedy, Graeme J Flutter boundary identification from time-domain simulations using the matrix pencil method Journal Article AIAA Journal, 2019. Links | BibTeX @article{Kiviaho:2019:AIAAJ_flutter,
title = {Flutter boundary identification from time-domain simulations using the matrix pencil method},
author = {Jan F. Kiviaho and Kevin E. Jacobson and Graeme J. Kennedy},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2019/05/matrix_pencil_note.pdf},
doi = {https://arc.aiaa.org/doi/full/10.2514/1.J058072},
year = {2019},
date = {2019-05-01},
journal = {AIAA Journal},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Leader, Mark K; Chin, Ting Wei; Kennedy, Graeme J High-Resolution Topology Optimization with Stress and Natural Frequency Constraints Journal Article AIAA Journal, 2019. Links | BibTeX @article{Leader:2019:High-res,
title = {High-Resolution Topology Optimization with Stress and Natural Frequency Constraints},
author = {Mark K. Leader and Ting Wei Chin and Graeme J. Kennedy},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2019/05/Leader_AIAAJ_HighRes_Topo.pdf},
doi = {10.2514/1.J057777},
year = {2019},
date = {2019-04-29},
journal = {AIAA Journal},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Boopathy, Komahan; Kennedy, Graeme J Parallel Finite Element Framework for Rotorcraft Multibody Dynamics and Discrete Adjoint Sensitivities Journal Article AIAA Journal, 2019. Links | BibTeX @article{Boopathy:2018:rotorcraft-sensitivity,
title = {Parallel Finite Element Framework for Rotorcraft Multibody Dynamics and Discrete Adjoint Sensitivities},
author = {Komahan Boopathy and Graeme J Kennedy},
doi = {10.2514/1.J056585},
year = {2019},
date = {2019-01-01},
journal = {AIAA Journal},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Kennedy, Graeme J; Chi, Ting Wei A sequential convex optimization method for multimaterial compliance design problems Journal Article Computers & Structures, 212 , pp. 110 - 124, 2019, ISSN: 0045-7949. Links | BibTeX @article{Kennedy:2018:SCO,
title = {A sequential convex optimization method for multimaterial compliance design problems},
author = {Graeme J Kennedy and Ting Wei Chi},
url = {http://www.sciencedirect.com/science/article/pii/S0045794918308769},
doi = {10.1016/j.compstruc.2018.10.007},
issn = {0045-7949},
year = {2019},
date = {2019-01-01},
journal = {Computers & Structures},
volume = {212},
pages = {110 - 124},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
2018
|
Kiviaho, Jan F; Jacobson, Kevin; Smith, Marilyn J; Kennedy, Graeme Application of a Time-Accurate Aeroelastic Coupling Framework to Flutter-Constrained Design Optimization Inproceedings 19th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, AIAA Aviation Forum, 2018, (AIAA AIAA 2018-2932). Links | BibTeX @inproceedings{kiviaho2018b,
title = {Application of a Time-Accurate Aeroelastic Coupling Framework to Flutter-Constrained Design Optimization},
author = {Jan F Kiviaho and Kevin Jacobson and Marilyn J Smith and Graeme Kennedy},
doi = {10.2514/6.2018-2932},
year = {2018},
date = {2018-06-01},
booktitle = {19th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, AIAA Aviation Forum},
note = {AIAA AIAA 2018-2932},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Jacobson, Kevin; Kiviaho, Jan F; Smith, Marilyn J; Kennedy, Graeme An Aeroelastic Coupling Framework for Time-accurate Analysis and Optimization Inproceedings 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciŦech Forum, 2018, (AIAA 2018-0100). Links | BibTeX @inproceedings{jacobson2018,
title = {An Aeroelastic Coupling Framework for Time-accurate Analysis and Optimization},
author = {Kevin Jacobson and Jan F Kiviaho and Marilyn J Smith and Graeme Kennedy},
doi = {10.2514/6.2018-0100},
year = {2018},
date = {2018-01-07},
booktitle = {2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciŦech Forum},
note = {AIAA 2018-0100},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Leader, Mark; Chin, Ting~Wei; Kennedy, Graeme J High Resolution Topology Optimization of Aerospace Structures with Stress and Frequency Constraints Inproceedings AIAA Aviation 2018, 2018, (AIAA 2018-4056). Links | BibTeX @inproceedings{Leader:2018:Aviation,
title = {High Resolution Topology Optimization of Aerospace Structures with Stress and Frequency Constraints},
author = {Mark Leader and Ting~Wei Chin and Graeme J Kennedy},
doi = {10.2514/6.2018-4056},
year = {2018},
date = {2018-01-01},
booktitle = {AIAA Aviation 2018},
note = {AIAA 2018-4056},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Chin, Ting~Wei; Kennedy, Graeme J Multimaterial Thermoelastic Stress-constrained Topology Optimization of Structures with Adaptive Mesh Refinement Inproceedings 2018 Multidisciplinary Analysis and Optimization Conference, AIAA Aviation 2018, 2018, (AIAA 2018-4054). Links | BibTeX @inproceedings{Chin:2018:Aviation,
title = {Multimaterial Thermoelastic Stress-constrained Topology Optimization of Structures with Adaptive Mesh Refinement},
author = {Ting~Wei Chin and Graeme J Kennedy},
doi = {10.2514/6.2018-4054},
year = {2018},
date = {2018-01-01},
booktitle = {2018 Multidisciplinary Analysis and Optimization Conference, AIAA Aviation 2018},
note = {AIAA 2018-4054},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2017
|
Martins, Joaquim R R A; Kenway, Gaetan K W; Burdette, David; Jonsson, Eirikur; Kennedy, Graeme J High-fidelity Multidisciplinary Design Optimization of Aircraft Configurations Technical Report NASA, Washington DC (2017--219647), 2017. BibTeX @techreport{Martins2017a,
title = {High-fidelity Multidisciplinary Design Optimization of Aircraft Configurations},
author = {Joaquim R R A Martins and Gaetan K W Kenway and David Burdette and Eirikur Jonsson and Graeme J Kennedy},
year = {2017},
date = {2017-08-01},
number = {2017--219647},
institution = {NASA, Washington DC},
keywords = {},
pubstate = {published},
tppubtype = {techreport}
}
|
Kiviaho, Jan F; Jacobson, Kevin; Smith, Marilyn J; Kennedy, Graeme A Robust and Flexible Coupling Framework for Aeroelastic Analysis and Optimization Inproceedings 18th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, AIAA Aviation Forum, 2017, (AIAA 2017-4144). Links | BibTeX @inproceedings{kiviaho2017,
title = {A Robust and Flexible Coupling Framework for Aeroelastic Analysis and Optimization},
author = {Jan F Kiviaho and Kevin Jacobson and Marilyn J Smith and Graeme Kennedy},
doi = {10.2514/6.2017-4144},
year = {2017},
date = {2017-06-02},
booktitle = {18th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, AIAA Aviation Forum},
note = {AIAA 2017-4144},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Lambe, Andrew B; Kennedy, Graeme J; Martins, Joaquim R R A An evaluation of constraint aggregation strategies for wing box mass minimization Journal Article Structural and Multidisciplinary Optimization, 55 (1), pp. 257–277, 2017. Links | BibTeX @article{Lambe2017,
title = {An evaluation of constraint aggregation strategies for wing box mass minimization},
author = {Andrew B Lambe and Graeme J Kennedy and Joaquim R R A Martins},
url = {https://doi.org/10.1007/s00158-016-1495-1},
doi = {10.1007/s00158-016-1495-1},
year = {2017},
date = {2017-01-01},
journal = {Structural and Multidisciplinary Optimization},
volume = {55},
number = {1},
pages = {257--277},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Boopathy, Komahan; Kennedy, Graeme Adjoint-based derivative evaluation methods for flexible multibody systems with rotorcraft applications Inproceedings 55th AIAA Aerospace Sciences Meeting, Grapevine, TX, 2017. Links | BibTeX @inproceedings{Boopathy:2017:SciTech,
title = {Adjoint-based derivative evaluation methods for flexible multibody systems with rotorcraft applications},
author = {Komahan Boopathy and Graeme Kennedy},
doi = {10.2514/6.2017-1671},
year = {2017},
date = {2017-01-01},
booktitle = {55th AIAA Aerospace Sciences Meeting},
address = {Grapevine, TX},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2016
|
Kennedy, Graeme J A Full-space Barrier Method for Stress-constrained Discrete Material Design Optimization Journal Article Structural and Multidisciplinary Optimization, 2016, (Accepted). Links | BibTeX @article{Kennedy:2016:full-space,
title = {A Full-space Barrier Method for Stress-constrained Discrete Material Design Optimization},
author = {Graeme J. Kennedy},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2016/02/2015_full_space_methods.pdf},
doi = {10.1007/s00158-016-1428-z},
year = {2016},
date = {2016-01-01},
journal = {Structural and Multidisciplinary Optimization},
note = {Accepted},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Dener, Alp; Meng, Pengfei; Hicken, Jason E; Kennedy, Graeme J; Hwang, John; Gray, Justin S Kona: A Parallel Optimization Library for Engineering-Design Problems Inproceedings 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech, 2016. Links | BibTeX @inproceedings{Dener:2016:SciTech,
title = {Kona: A Parallel Optimization Library for Engineering-Design Problems},
author = {Alp Dener and Pengfei Meng and Jason E. Hicken and Graeme J. Kennedy and John Hwang and Justin S. Gray},
doi = {10.2514/6.2016-1422},
year = {2016},
date = {2016-01-01},
booktitle = {57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Brooks, Timothy R; Kennedy, Graeme J; Martins, Joaquim R R A High-fidelity Aerostructural Optimization of a High Aspect Ratio Tow-steered Wing Inproceedings 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech, 2016. Links | BibTeX @inproceedings{Brooks:2016:SciTech,
title = {High-fidelity Aerostructural Optimization of a High Aspect Ratio Tow-steered Wing},
author = {Timothy R. Brooks and Graeme J. Kennedy and Joaquim R. R. A. Martins},
doi = {10.2514/6.2016-1179},
year = {2016},
date = {2016-01-01},
booktitle = {57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Chin, Ting~Wei; Kennedy, Graeme J Large-Scale Compliance-Minimization and Buckling Topology Optimization of the Undeformed Common Research Model Wing Inproceedings 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech, 2016. Links | BibTeX @inproceedings{Chin:2016:SciTech,
title = {Large-Scale Compliance-Minimization and Buckling Topology Optimization of the Undeformed Common Research Model Wing},
author = {Ting~Wei Chin and Graeme J. Kennedy},
doi = {10.2514/6.2016-0939},
year = {2016},
date = {2016-01-01},
booktitle = {57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Kennedy, Graeme J; Boopathy, Komahan A Scalable Adjoint Method for Coupled Flexible Multibody Dynamics Inproceedings 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech, 2016. Links | BibTeX @inproceedings{Kennedy:2016:SciTech,
title = {A Scalable Adjoint Method for Coupled Flexible Multibody Dynamics},
author = {Graeme J. Kennedy and Komahan Boopathy},
doi = {10.2514/6.2016-1907},
year = {2016},
date = {2016-01-01},
booktitle = {57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Chin, Ting~Wei; Kennedy, Graeme J Efficient Large-Scale Thermoelastic Topology Optimization of CAD
Geometry with Automated Adaptive Mesh Generation Inproceedings 59th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and
Materials Conference, AIAA SciTech, 2016. Links | BibTeX @inproceedings{Chin:2018:SciTech,
title = {Efficient Large-Scale Thermoelastic Topology Optimization of CAD
Geometry with Automated Adaptive Mesh Generation},
author = {Ting~Wei Chin and Graeme J Kennedy},
doi = {https://doi.org/10.2514/6.2018-1381},
year = {2016},
date = {2016-01-01},
booktitle = {59th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and
Materials Conference, AIAA SciTech},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Kennedy, Graeme J Adjoint-based Mesh Adaptation Techniques for Aggregation Functionals in Structural Design Optimization Inproceedings 17th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, AIAA Aviation, 2016, (AIAA 2016-4127). Links | BibTeX @inproceedings{Kennedy:2016:Aviation,
title = {Adjoint-based Mesh Adaptation Techniques for Aggregation Functionals in Structural Design Optimization},
author = {Graeme J Kennedy},
doi = {10.2514/6.2016-4127},
year = {2016},
date = {2016-01-01},
booktitle = {17th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, AIAA Aviation},
note = {AIAA 2016-4127},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2015
|
Kennedy, Graeme J A Full-Space Method with Matrix Aggregates for Stress-Constrained Structural Optimization Inproceedings 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Dallas, TX, 2015. Links | BibTeX @inproceedings{Kennedy:2015:Aviation,
title = {A Full-Space Method with Matrix Aggregates for Stress-Constrained Structural Optimization},
author = {Graeme J. Kennedy},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2015/06/2015_sdp_paper.pdf},
year = {2015},
date = {2015-07-01},
booktitle = {16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference},
address = {Dallas, TX},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Kennedy, Graeme J Discrete thickness optimization via piecewise constraint penalization Journal Article Structural and Multidisciplinary Optimization, 51 (6), pp. 1247-1265, 2015. Abstract | Links | BibTeX @article{Kennedy:2014:dto,
title = {Discrete thickness optimization via piecewise constraint penalization},
author = {Graeme J. Kennedy},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2014/12/2013_DTO_paper.pdf},
doi = {10.1007/s00158-014-1210-z},
year = {2015},
date = {2015-06-01},
journal = {Structural and Multidisciplinary Optimization},
volume = {51},
number = {6},
pages = {1247-1265},
abstract = {Structural engineers are often constrained by cost or manufacturing considerations to select member thicknesses from a discrete set of values. Conventional, gradient-free techniques to solve these discrete problems cannot handle large problem sizes, while discrete material optimization (DMO) techniques may encounter difficulties, especially for bending-dominated problems. To resolve these issues, we propose an efficient gradient-based technique to obtain engineering solutions to the discrete thickness selection problem. The proposed technique uses a series of constraints to enforce an effective stiffness-to-mass and strength-to-mass penalty on intermediate designs. In conjunction with these constraints, we apply an exact penalty function which drives the solution towards a discrete design. We utilize a continuation approach to obtain approximate solutions to the discrete thickness selection problem by solving a sequence of relaxed continuous problems with increasing penalization. We also show how this approach can be applied to combined discrete thickness selection and topology optimization design problems. To demonstrate the effectiveness of the proposed technique, we present both compliance and stress-constrained results for in-plane and bending-dominated problems.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Structural engineers are often constrained by cost or manufacturing considerations to select member thicknesses from a discrete set of values. Conventional, gradient-free techniques to solve these discrete problems cannot handle large problem sizes, while discrete material optimization (DMO) techniques may encounter difficulties, especially for bending-dominated problems. To resolve these issues, we propose an efficient gradient-based technique to obtain engineering solutions to the discrete thickness selection problem. The proposed technique uses a series of constraints to enforce an effective stiffness-to-mass and strength-to-mass penalty on intermediate designs. In conjunction with these constraints, we apply an exact penalty function which drives the solution towards a discrete design. We utilize a continuation approach to obtain approximate solutions to the discrete thickness selection problem by solving a sequence of relaxed continuous problems with increasing penalization. We also show how this approach can be applied to combined discrete thickness selection and topology optimization design problems. To demonstrate the effectiveness of the proposed technique, we present both compliance and stress-constrained results for in-plane and bending-dominated problems. |
Kennedy, Graeme J; Hicken, Jason E Improved Constraint-Aggregation Methods Journal Article Computer Methods in Applied Mechanics and Engineering, 289 , pp. 332-354, 2015. Abstract | Links | BibTeX @article{Kennedy:2014:ks-paper,
title = {Improved Constraint-Aggregation Methods},
author = {Graeme J. Kennedy and Jason E. Hicken},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2015/03/aggregation_methods.pdf},
doi = {10.1016/j.cma.2015.02.017},
year = {2015},
date = {2015-03-01},
journal = {Computer Methods in Applied Mechanics and Engineering},
volume = {289},
pages = {332-354},
abstract = {Many constraints in design-optimization problems take the form of bounds on a physical quantity over a domain. These infinite-dimensional constraints are often addressed through aggregation methods that approximate the bound in a differentiable manner. However, the most common constraint-aggregation methods exhibit mesh dependence; as the mesh spacing decreases, the aggregation function diverges. In addition, there are no established methods to assess the impact of constraint aggregation on the optimized design. To address these deficiencies, we propose a new class of constraint-aggregation method that we call induced aggregates. We examine the properties of these aggregation methods, describe their numerical implementation, and test their numerical accuracy on a pressure-loaded circular cylinder test case. Furthermore, we propose a post-optimality estimation technique to assess the impact of the constraint-aggregation method on the design. We use this method to examine the optimized mass obtained from two stress-constrained mass minimization problems: a variable-thickness sheet problem and a wingbox design problem.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Many constraints in design-optimization problems take the form of bounds on a physical quantity over a domain. These infinite-dimensional constraints are often addressed through aggregation methods that approximate the bound in a differentiable manner. However, the most common constraint-aggregation methods exhibit mesh dependence; as the mesh spacing decreases, the aggregation function diverges. In addition, there are no established methods to assess the impact of constraint aggregation on the optimized design. To address these deficiencies, we propose a new class of constraint-aggregation method that we call induced aggregates. We examine the properties of these aggregation methods, describe their numerical implementation, and test their numerical accuracy on a pressure-loaded circular cylinder test case. Furthermore, we propose a post-optimality estimation technique to assess the impact of the constraint-aggregation method on the design. We use this method to examine the optimized mass obtained from two stress-constrained mass minimization problems: a variable-thickness sheet problem and a wingbox design problem. |
Kennedy, Graeme J Strategies for adaptive optimization with aggregation constraints using interior-point methods Journal Article Computers & Structures, 153 , pp. 217-229, 2015. Abstract | Links | BibTeX @article{Kennedy:2014:adaptive-ks,
title = {Strategies for adaptive optimization with aggregation constraints using interior-point methods},
author = {Graeme J. Kennedy},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2015/03/2014_adaptive_ks.pdf},
doi = {10.1016/j.compstruc.2015.02.024},
year = {2015},
date = {2015-03-01},
journal = {Computers & Structures},
volume = {153},
pages = {217-229},
abstract = {Constraint-aggregation methods are used in engineering optimization problems to approximately impose a bound on a quantity of interest in a differentiable manner. In this paper, we present strategies to adaptively solve aggregation-constrained problems. These adaptive techniques achieve a tighter bound approximation while also reducing the computational cost of optimization. We focus on two aggregation techniques: Kreisselmeier–Steinhauser (KS) aggregation, and induced exponential aggregation. We demonstrate that the proposed adaptive technique achieves significant computational savings compared to fixed-aggregation methods for a series of stress-constrained mass-minimization problems.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Constraint-aggregation methods are used in engineering optimization problems to approximately impose a bound on a quantity of interest in a differentiable manner. In this paper, we present strategies to adaptively solve aggregation-constrained problems. These adaptive techniques achieve a tighter bound approximation while also reducing the computational cost of optimization. We focus on two aggregation techniques: Kreisselmeier–Steinhauser (KS) aggregation, and induced exponential aggregation. We demonstrate that the proposed adaptive technique achieves significant computational savings compared to fixed-aggregation methods for a series of stress-constrained mass-minimization problems. |
Kennedy, Graeme J Large-Scale Multimaterial Topology Optimization for Additive Manufacturing Inproceedings 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Kissimmee, FL, 2015. Links | BibTeX @inproceedings{Kennedy:2015:SciTech,
title = {Large-Scale Multimaterial Topology Optimization for Additive Manufacturing},
author = {Graeme J. Kennedy},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2015/04/2015_SDM_paper.pdf},
year = {2015},
date = {2015-01-01},
booktitle = {56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference},
address = {Kissimmee, FL},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2014
|
James, Kai A; Kennedy, Graeme J; Martins, Joaquim R R A Concurrent aerostructural topology optimization of a wing box Journal Article Computers & Structures, 134 , pp. 1 - 17, 2014, ISSN: 0045-7949. Links | BibTeX @article{James:2014:aerostruct-topo,
title = {Concurrent aerostructural topology optimization of a wing box},
author = {Kai A. James and Graeme J. Kennedy and Joaquim R.R.A. Martins},
url = {http://www.sciencedirect.com/science/article/pii/S0045794913003398},
doi = {10.1016/j.compstruc.2013.12.007},
issn = {0045-7949},
year = {2014},
date = {2014-01-01},
journal = {Computers & Structures},
volume = {134},
pages = {1 - 17},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Kenway, Gaetan K W; Kennedy, Graeme J; Martins, Joaquim R R A Scalable parallel approach for high-fidelity steady-state aeroelastic analysis and adjoint derivative computations Journal Article AIAA Journal, 52 , pp. 935-951, 2014. Links | BibTeX @article{Kenway:2014:SPAHFA,
title = {Scalable parallel approach for high-fidelity steady-state aeroelastic analysis and adjoint derivative computations},
author = {Gaetan K. W. Kenway and Graeme J. Kennedy and Joaquim R. R. A. Martins},
url = {http://arc.aiaa.org/doi/abs/10.2514/1.J052255},
doi = {10.2514/1.J052255},
year = {2014},
date = {2014-01-01},
journal = {AIAA Journal},
volume = {52},
pages = {935-951},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Kennedy, Graeme J; Martins, Joaquim R R A A parallel aerostructural optimization framework for aircraft design studies Journal Article Structural and Multidisciplinary Optimization, pp. 1-23, 2014, ISSN: 1615-147X. Links | BibTeX @article{Kennedy:2014:tacs-tripan,
title = {A parallel aerostructural optimization framework for aircraft design studies},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2014/12/2013_tripan_paper.pdf},
doi = {10.1007/s00158-014-1108-9},
issn = {1615-147X},
year = {2014},
date = {2014-01-01},
journal = {Structural and Multidisciplinary Optimization},
pages = {1-23},
publisher = {Springer Berlin Heidelberg},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Kennedy, Graeme J; Martins, Joaquim R R A A parallel finite-element framework for large-scale gradient-based design optimization of high-performance structures Journal Article Finite Elements in Analysis and Design, 87 (0), pp. 56 - 73, 2014, ISSN: 0168-874X. Links | BibTeX @article{Kennedy:2014:TACS,
title = {A parallel finite-element framework for large-scale gradient-based design optimization of high-performance structures},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2015/10/2013_tacs_paper.pdf},
doi = {10.1016/j.finel.2014.04.011},
issn = {0168-874X},
year = {2014},
date = {2014-01-01},
journal = {Finite Elements in Analysis and Design},
volume = {87},
number = {0},
pages = {56 - 73},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Kennedy, Graeme J; Kenway, Gaetan K W; Martins, Joaquim R R A High Aspect Ratio Wing Design: Optimal Aerostructural Tradeoffs for the Next Generation of Materials Inproceedings 52nd Aerospace Sciences Meeting, National Harbor, Maryland, 2014, (AIAA 2014-0596). BibTeX @inproceedings{Kennedy:2014:High-aspect-ratio,
title = {High Aspect Ratio Wing Design: Optimal Aerostructural Tradeoffs for the Next Generation of Materials},
author = {Graeme J. Kennedy and Gaetan K. W. Kenway and Joaquim R. R. A. Martins},
year = {2014},
date = {2014-01-01},
booktitle = {52nd Aerospace Sciences Meeting},
address = {National Harbor, Maryland},
note = {AIAA 2014-0596},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Kenway, Gaetan K W; Kennedy, Graeme J; Martins, Joaquim R R A Aerostructural optimization of the Common Research Model configuration Inproceedings Aviation 2014, Atlanta, Georgia, 2014. BibTeX @inproceedings{Kenway:2014:Aviation,
title = {Aerostructural optimization of the Common Research Model configuration},
author = {Gaetan K. W. Kenway and Graeme J. Kennedy and Joaquim R. R. A. Martins},
year = {2014},
date = {2014-01-01},
booktitle = {Aviation 2014},
address = {Atlanta, Georgia},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Kennedy, Graeme J; Kenway, Gaetan K W; Martins, Joaquim R R A Towards Gradient-Based Design Optimization of Flexible Transport Aircraft with Flutter Constraints Inproceedings Aviation 2014, Atlanta, Georgia, 2014. BibTeX @inproceedings{Kennedy:2014:Aviation,
title = {Towards Gradient-Based Design Optimization of Flexible Transport Aircraft with Flutter Constraints},
author = {Graeme J. Kennedy and Gaetan K. W. Kenway and Joaquim R. R. A. Martins},
year = {2014},
date = {2014-01-01},
booktitle = {Aviation 2014},
address = {Atlanta, Georgia},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Lambe, Andrew B; Kennedy, Graeme J; Martins, Joaquim R R A Multidisciplinary Design Optimization of an Aircraft Wing via a Matrix-Free Approach Inproceedings 15th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Atlanta, GA, 2014. BibTeX @inproceedings{Lambe:2014:Aviation,
title = {Multidisciplinary Design Optimization of an Aircraft Wing via a Matrix-Free Approach},
author = {Andrew B. Lambe and Graeme J. Kennedy and Joaquim R. R. A. Martins},
year = {2014},
date = {2014-01-01},
booktitle = {15th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference},
address = {Atlanta, GA},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2013
|
Kennedy, Graeme J; Martins, Joaquim R R A A laminate parametrization technique for discrete ply-angle problems with manufacturing constraints Journal Article Structural and Multidisciplinary Optimization, pp. 1-15, 2013, ISSN: 1615-147X. Links | BibTeX @article{Kennedy:2012:SMO,
title = {A laminate parametrization technique for discrete ply-angle problems with manufacturing constraints},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2014/12/2012_SMO_Kennedy.pdf},
doi = {10.1007/s00158-013-0906-9},
issn = {1615-147X},
year = {2013},
date = {2013-01-01},
journal = {Structural and Multidisciplinary Optimization},
pages = {1-15},
publisher = {Springer-Verlag},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Kennedy, Graeme J; Martins, Joaquim R R A Hybrid-parallel Methods for Large-scale Gradient-based Structural Design Optimization Inproceedings 10th World Congress on Structural and Multidisciplinary Optimization, Orlando, FA, 2013. BibTeX @inproceedings{Kennedy:2013:ISSMO-large-scale,
title = {Hybrid-parallel Methods for Large-scale Gradient-based Structural Design Optimization},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins},
year = {2013},
date = {2013-01-01},
booktitle = {10th World Congress on Structural and Multidisciplinary Optimization},
address = {Orlando, FA},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Kennedy, Graeme J; Martins, Joaquim R R A An Adjoint-based Derivative Evaluation Method for Time-dependent Aeroelastic Optimization of Flexible Aircraft Inproceedings Proceedings of the 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, MA, 2013. Links | BibTeX @inproceedings{Kennedy:2013:SDM,
title = {An Adjoint-based Derivative Evaluation Method for Time-dependent Aeroelastic Optimization of Flexible Aircraft},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2015/04/2013_SDM.pdf},
year = {2013},
date = {2013-01-01},
booktitle = {Proceedings of the 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference},
address = {Boston, MA},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2012
|
Kennedy, Graeme J; Martins, Joaquim R R A A homogenization-based theory for anisotropic beams with accurate through-section stress and strain prediction Journal Article International Journal of Solids and Structures, 49 (1), pp. 54 - 72, 2012, ISSN: 0020-7683. Links | BibTeX @article{Kennedy:2011:HBT,
title = {A homogenization-based theory for anisotropic beams with accurate through-section stress and strain prediction},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2014/12/hbtpaper.pdf},
doi = {10.1016/j.ijsolstr.2011.09.012},
issn = {0020-7683},
year = {2012},
date = {2012-01-01},
journal = {International Journal of Solids and Structures},
volume = {49},
number = {1},
pages = {54 - 72},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Kenway, Gaetan K W; Kennedy, Graeme J; Martins, Joaquim R R A A Scalable Parallel Approach for High-Fidelity Aerostructural Analysis and Optimization Inproceedings 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, HI, 2012, (AIAA-2012-1922). BibTeX @inproceedings{Kenway:2012:SPA,
title = {A Scalable Parallel Approach for High-Fidelity Aerostructural Analysis and Optimization},
author = {Gaetan K. W. Kenway and Graeme J. Kennedy and Joaquim R. R. A. Martins},
year = {2012},
date = {2012-01-01},
booktitle = {53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference},
address = {Honolulu, HI},
note = {AIAA-2012-1922},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Kennedy, Graeme J; Martins, Joaquim R R A A Comparison of Metallic and Composite Aircraft Wings Using Aerostructural Design Optimization Inproceedings 14th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Indianapolis, IN, 2012. BibTeX @inproceedings{Kennedy:2012:CMC,
title = {A Comparison of Metallic and Composite Aircraft Wings Using Aerostructural Design Optimization},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins},
year = {2012},
date = {2012-01-01},
booktitle = {14th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference},
address = {Indianapolis, IN},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Kennedy, Graeme J; Martins, Joaquim R R A A Regularized Discrete Laminate Parametrization Technique with Applications to Wing-Box Design Optimization Inproceedings 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, HI, 2012, (AIAA-2012-1519). BibTeX @inproceedings{Kennedy:2012:RDL,
title = {A Regularized Discrete Laminate Parametrization Technique with Applications to Wing-Box Design Optimization},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins},
year = {2012},
date = {2012-01-01},
booktitle = {53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference},
address = {Honolulu, HI},
note = {AIAA-2012-1519},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2011
|
Kennedy, Graeme J; Martins, Joaquim R R A Aerostructural design optimization of composite aircraft with stress and local buckling constraints using an implicit structural parametrization Inproceedings Proceedings of CASI AERO 2011, Montreal, Quebec, 2011. BibTeX @inproceedings{Kennedy:2011:ADO,
title = {Aerostructural design optimization of composite aircraft with stress and local buckling constraints using an implicit structural parametrization},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins},
year = {2011},
date = {2011-01-01},
booktitle = {Proceedings of CASI AERO 2011},
address = {Montreal, Quebec},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
James, Kai A; Kennedy, Graeme J; Martins, Joaquim R R A Aerostructural topology optimization of an aircraft wingbox Inproceedings Proceedings of CASI AERO 2011, Montreal, Quebec, 2011. BibTeX @inproceedings{James:2011:ATO,
title = {Aerostructural topology optimization of an aircraft wingbox},
author = {Kai A. James and Graeme J. Kennedy and Joaquim R. R. A. Martins},
year = {2011},
date = {2011-01-01},
booktitle = {Proceedings of CASI AERO 2011},
address = {Montreal, Quebec},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Kennedy, Graeme J; Hansen, Jorn S; Martins, Joaquim R R A A Timoshenko beam theory with pressure corrections for layered orthotropic beams Journal Article International Journal of Solids and Structures, 48 (16-17), pp. 2373 - 2382, 2011, ISSN: 0020-7683. Links | BibTeX @article{Kennedy:2011:IJSS,
title = {A Timoshenko beam theory with pressure corrections for layered orthotropic beams},
author = {Graeme J. Kennedy and Jorn S. Hansen and Joaquim R. R. A. Martins},
url = {http://gkennedy.gatech.edu/wp-content/uploads/2014/12/paper.pdf},
doi = {10.1016/j.ijsolstr.2011.04.009},
issn = {0020-7683},
year = {2011},
date = {2011-01-01},
journal = {International Journal of Solids and Structures},
volume = {48},
number = {16-17},
pages = {2373 - 2382},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
2010
|
Kenway, Gaetan K W; Kennedy, Graeme J; Martins, Joaquim R R A A CAD-free approach to high-fidelity aerostructural optimization Inproceedings 13th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Forth Worth, TX, AIAA-2010-9231 2010. BibTeX @inproceedings{Kenway:2010:CAD,
title = {A CAD-free approach to high-fidelity aerostructural optimization},
author = {Gaetan K. W. Kenway and Graeme J. Kennedy and Joaquim R. R. A. Martins},
year = {2010},
date = {2010-01-01},
booktitle = {13th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Forth Worth, TX},
organization = {AIAA-2010-9231},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
Kennedy, Graeme J; Hansen, Jorn S The hybrid-adjoint method: A semi-analytic gradient evaluation technique applied to composite cure cycle optimization Journal Article Optimization and Engineering, 11 , pp. 23-43, 2010. BibTeX @article{Kennedy:2010:HAM,
title = {The hybrid-adjoint method: A semi-analytic gradient evaluation technique applied to composite cure cycle optimization},
author = {Graeme J. Kennedy and Jorn S. Hansen},
year = {2010},
date = {2010-01-01},
journal = {Optimization and Engineering},
volume = {11},
pages = {23-43},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
Kennedy, Graeme J; Martins, Joaquim R R A Parallel solution methods for aerostructural analysis and design optimization Inproceedings Proceedings of the 13th AIAA/ISSMO Multidisciplinary Analysis Optimization Conference, Fort Worth,~TX, 2010, (AIAA 2010-9308). BibTeX @inproceedings{Kennedy:2010:PSM,
title = {Parallel solution methods for aerostructural analysis and design optimization},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins},
year = {2010},
date = {2010-01-01},
booktitle = {Proceedings of the 13th AIAA/ISSMO Multidisciplinary Analysis Optimization Conference},
address = {Fort Worth,~TX},
note = {AIAA 2010-9308},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|
2008
|
Kennedy, Graeme J; Martins, Joaquim R R A; Hansen, Jorn S Aerostructural optimization of aircraft structures using asymmetric subspace optimization Inproceedings 12th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Victoria, BC, AIAA 2008, (AIAA-2008-5847). BibTeX @inproceedings{Kennedy:2008:AOA,
title = {Aerostructural optimization of aircraft structures using asymmetric subspace optimization},
author = {Graeme J. Kennedy and Joaquim R. R. A. Martins and Jorn S. Hansen},
year = {2008},
date = {2008-01-01},
booktitle = {12th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Victoria, BC},
organization = {AIAA},
note = {AIAA-2008-5847},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
|