Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Time History Analysis of Sturctures Subjected to Random Base Excitation by a Substructuring Method

부구조법을 이용한 불규칙 기초가진을 받는 구조물의 시간 이력 해석

  • Lee, Tae Won (Dept. of Mechanical Design Engineering, Kumoh National Institute of Technology)
  • 이태원 (금오공과대학교 기계설계공학과)
  • Received : 2021.12.07
  • Accepted : 2022.02.04
  • Published : 2022.03.31
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Abstract

The mechanical structures mounted on vehicles or aircrafts are subject to random accelerations, such as earthquakes, at the base, and their responses have been calculated through spectrum analysis. However, this method poses a challenge during the synthesis of the responses owing to the loss of the vibration phase. It is necessary to evaluate the time history results to obtain the exact responses; therefore, an efficient technique is proposed to solve this issue. The present technique involves constructing a superelement using the sub-structuring method and finding solutions for this superelement. The finite element model (FEM) was substituted by a superelement, which was simplified into one element with selected nodes. Comparing the numerical results of the superelement with the time history responses for the original finite element model, the two solutions agree well despite the fact that the computation time of the proposed technique has been greatly shortened.

Keywords

Acknowledgement

이 연구는 금오공과대학교 학술연구비로 지원되었음(과제번호 202001150001).

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