Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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A Study on an Optimal Spot-weld Layout Design for a Shock Tower Structure Considering the Fatigue Life under Random Vibration Loads

불규칙 진동하중을 받는 쇽 타워의 피로수명을 고려한 점용접 위치 최적설계

  • 이용훈 (국민대학교 자동차공학 전문대학원) ;
  • 이승윤 (국민대학교 자동차공학 전문대학원) ;
  • 배복수 (국민대학교 자동차공학 전문대학원) ;
  • 이상범 (국민대학교 자동차공학 전문대학원) ;
  • 임홍재 (국민대학교)
  • Received : 2011.04.25
  • Accepted : 2011.08.02
  • Published : 2011.09.20
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Abstract

In this paper, optimal spot weld layout design for a shock tower structure is presented. This design increases the fatigue life of the spot-welds thereby increasing the fatigue life of the shock tower itself. In order to predict the fatigue life, a quasi-static analysis has been conducted then a fatigue analysis was performed through the application of random vibration loads. In order to optimize the spot weld layout, the design variables that have an effect on the spot weld fatigue life were determined. A spot weld fatigue analysis was then conducted based on the experiment design. Finally, a response surface model was made using the fatigue analysis results and an optimized spot weld layout model, one that increases the fatigue life of the spot welds and thereby the fatigue life of the shock tower, was developed.

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References

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