Dissertation/Thesis Abstract

Multilevel design optimization of automotive structures using dummy- and vehicle-based responses
by Gandikota, Imtiaz Shareef, M.S., Mississippi State University, 2013, 134; 1543335
Abstract (Summary)

A computationally efficient multilevel decomposition and optimization framework is developed for application to automotive structures. A full scale finite element (FE) model of a passenger car along with a dummy and occupant restraint system (ORS) is used to analyze crashworthiness and occupant safety criteria in two crash scenarios. The vehicle and ORS models are incorporated into a decomposed multilevel framework and optimized with mass and occupant injury criteria as objectives. A surrogate modeling technique is used to approximate the computationally expensive nonlinear FE responses. A multilevel target matching optimization problem is formulated to obtain a design satisfying system level performance targets. A balance is sought between crashworthiness and structural rigidity while minimizing overall mass of the vehicle. Two separate design problems involving crash and crash+vibration are considered. A major finding of this study is that, it is possible to achieve greater weight savings by including dummy-based responses in optimization problem.

Indexing (document details)
Advisor: Rais-Rohani, Masoud
Commitee: Lacy, Thomas E., Motoyama, Keiichi
School: Mississippi State University
Department: Aerospace Engineering
School Location: United States -- Mississippi
Source: MAI 52/02M(E), Masters Abstracts International
Source Type: DISSERTATION
Subjects: Aerospace engineering
Keywords: Analytical target cascading, Crash analysis, Crashworthiness, Design optimization, Occupant restraint system, Surrogate modeling
Publication Number: 1543335
ISBN: 9781303295577
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