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

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.

• Record URL:
  https://doi.org/10.1177/0954407016658146
• Record URL:
  http://journals.sagepub.com/doi/abs/10.1177/0954407016658146
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09544070
• Supplemental Notes:
  • Reprinted by permission of Sage Publications, Ltd.
• Authors:
  • Lee, Youngmyung
  • Park, Gyung-Jin
• Publication Date: 2017-4

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 600-614
• Serial:
  • Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
  • Volume: 231
  • Issue Number: 5
  • Publisher: Sage Publications Limited
  • ISSN: 0954-4070
  • EISSN: 2041-2991
  • Serial URL: http://pid.sagepub.com/content/current

Subject/Index Terms

• TRT Terms: Crash analysis; Crash tests; Frontal crashes; Methodology; Programming (Mathematics); Side crashes; Static loads; Time domain analysis
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01633474
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 14 2017 8:51AM