Studies on occupant restraint method in car crash using reduced-order dynamic model considering thoracic deflection

Terumasa Narukawa, Hidekazu Nishimura, Yuichi Ito, Yasuki Motozawa

Research output: Contribution to journalArticle


A simple dynamic model will be effective to determine the properties of protection devices because it is useful to understand the essential dynamics of the occupant in car crash. This paper describes an optimal restraint method in frontal car crash by using a reduced-order dynamic model based on human finite element model having age-specific characteristics such as bone stiffness and tolerance of the body. The restraint force is determined so as to minimize the maximum thoracic deflection, which is one of the representing injury criteria in frontal car crash, while the maximum thorax and pelvis displacements are restrained. Simulation results clarify that the optimal restraint force is effective for reducing the maximum thoracic deflection.

Original languageEnglish
Pages (from-to)1396-1405
Number of pages10
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number801
Publication statusPublished - 2013 Jul 15
Externally publishedYes



  • Automobile
  • Impact biomechanics
  • Motion control
  • Occupant protection
  • Optimization
  • Reduced-order model

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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