59th CFD Seminar:
LARGE-SCALE TOPOLOGY OPTIMIZATION METHODS FOR ADDITIVELY MANUFACTURED STRUCTURES
Graeme Kenedy, Georgia Tech
July 15, 2015, 11:00 am, NIA, Rm 142
Live Seminar
Abstract:
Additive manufacturing methods give engineers greater freedom to design structures with fewer geometric and processing constraints than conventional manufacturing methods. Additive manufacturing, therefore, has the potential to enable the design and production of low-weight high-performance structures. However, optimization of additively-manufactured structures using conventional optimization techniques, such as topology optimization, is challenging due to the demanding mesh requirements and large size of the design problem. In this presentation, these difficulties will be addressed through scalable methods for large-scale analysis and optimization. The proposed approach utilizes a multigrid-preconditioned Krylov method for solving large structural finite-element problems coupled with a parallel interior-point method for large-scale constrained optimization. The proposed method will be demonstrated on a large-scale mass-constrained compliance minimization problem for a structure discretized using a 64 × 64 × 256 element mesh, resulting in 3.26 million structural degrees of freedom, 5.24 million design variables and 1.05 million linear constraints.
Biography:
Graeme Kennedy is an Assistant Professor in the School of Aerospace Engineering at the Georgia Institute of Technology where he leads his research group focused on developing novel design optimization methods for structural and multidisciplinary aerospace systems. Before joining the Georgia Tech faculty, he worked as a Postdoctoral Research Fellow at the University of Michigan in the Multidisciplinary Design Optimization lab. He received his Ph.D. from the University of Toronto Institute for Aerospace Studies (UTIAS) under the supervision of Prof. Joaquim R.R.A. Martins in 2012 and his M.A.Sc. from UTIAS under the supervision of Prof. Jorn Hansen in 2007. He received his undergraduate degree in Aerospace Engineering from the University of Toronto in 2005. A complete list of papers and ongoing projects is available on Dr. Kennedy’s website: http://gkennedy.gatech.edu/, and U.S. Army Contact: Li-Wang@utc.edu.