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A Study on the Joint Stiffness of Automotive Structural Model

차체구조 모형의 조인트 해석에 관한 연구

  • Mun, Yong-Mo (Korea Institute of Science and Technology) ;
  • Jee, Tae-Han (Dept.of Mechanical Engineering, Graduate School of Yonsei University) ;
  • Park, Young-Pil (Dept.of Mechanical Engineering, Yonsei University)
  • 문용모 (한국과학기술연구원) ;
  • 지태한 (연세대학교 대학원 기계공학과) ;
  • 박영필 (연세대학교 기계공학과)
  • Published : 1996.05.01

Abstract

In building a finite element model of as automotive structure, the pillars and rockers are generally modeled as beam elemnts. The finite elemtns modeling using beam is faster and more efficient than that using shell elemetns. A joint is defined as theintersectio region of beam elemts and generally modeled with coupled rotational springs. In this study, hoint modeling technique is presented. First, the definitions of and anlaysis hypothesis for the joint are defined. Second the evaluation method of the joint stiffness from the static test is proposed. This method is simpler than existing evaluaiton methods. Third, the sensitivity analysis method and updating algorithm forjoint stiffness are presented. To verify these melthods, the finite element results of structural models with rigid joints and rotational spring joints are compared with experimental results.

Keywords

Joint Stiffness;Equivalent Tranaslational Spring;Sensitivity Analysis;Structural Modification