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Non-linear dynamic response structural optimization for frontal-impact and side-impact crash tests

Title
Non-linear dynamic response structural optimization for frontal-impact and side-impact crash tests
Author
박경진
Keywords
Crash optimization; contact non-linearity; equivalent-static-loads method; inertia relief method; non-linear dynamic response structural optimization; EQUIVALENT STATIC LOADS; TOPOLOGY OPTIMIZATION; SENSITIVITY-ANALYSIS; DESIGN; SYSTEMS
Issue Date
2017-04
Publisher
SAGE PUBLICATIONS LTD
Citation
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING, v. 231, No. 5, Page. 600-614
Abstract
Vehicle crash optimization is a representative non-linear dynamic response structural optimization that utilizes highly non-linear vehicle crash analysis in the time domain. In the automobile industries, crash optimization is employed to enhance the crashworthiness characteristics. The equivalent-static-loads method has been developed for such non-linear dynamic response structural optimization. The equivalent static loads are the static loads that generate the same displacement field in linear static analysis as those of non-linear dynamic analysis at a certain time step, and the equivalent static loads are imposed as external loads in linear static structural optimization. In this research, the conventional equivalent-static-loads method is expanded to the crash management system with regard to the frontal-impact test and a full-scale vehicle for a side-impact crash test. Crash analysis frequently considers unsupported systems which do not have boundary conditions and where adjacent structures do not penetrate owing to contact. Since the equivalent-static-loads method uses linear static response structural optimization, boundary conditions are required, and the impenetrability condition cannot be directly considered. To overcome the difficulties, a problem without boundary conditions is solved by using the inertia relief method. Thus, relative displacements with respect to a certain reference point are used in linear static response optimization. The impenetrability condition in non-linear analysis is transformed to the impenetrability constraints in linear static response optimization.
URI
http://journals.sagepub.com/doi/abs/10.1177/0954407016658146https://repository.hanyang.ac.kr/handle/20.500.11754/71985
ISSN
0954-4070; 2041-2991
DOI
10.1177/0954407016658146
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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