Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Fatigue Analysis of Rear Suspension Part Applying Multi-body Dynamics

다물체 동역학을 이용한 후륜 현가 부품의 내구해석

  • Jeon, Seong Min (Dept. of Mechanical Engineering, Korea Univ. of Technology and Education) ;
  • Cho, Byung-Kwan (Dept. of Mechanical Engineering, Korea Univ. of Technology and Education)
  • 전성민 (한국기술교육대학교 기계공학부) ;
  • 조병관 (한국기술교육대학교 기계공학부)
  • Received : 2014.08.13
  • Accepted : 2015.07.16
  • Published : 2015.10.01
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Abstract

During the development of vehicles, durability tests are time consuming and costly. Recently, automobile companies have attempted to develop their own durability evaluation procedures by modifying and complementing . In this paper, we propose an integrated computer-aided engineering (CAE) method to evaluate the durability of a torsion beam axle (TBA). We compare this method with the standardized durability evaluation method used by an actual automobile company in order to determine the feasibility of this method. We compare the results with the test result data to enable us to estimate the reliability of the analysis results. In this study, we analyze the processes and results of the quasi-static fatigue analysis, and found improved methods and problems. Furthermore, we perform a thorough test using the requirements of the actual company. Based on the results, the structural analysis process in the quasi-static fatigue analysis method was superseded by the multi-body dynamics analysis process. Generally, this method is referred to as the resonance-fatigue analysis method.

차량의 개발단계에서 내구성 평가는 많은 시간과 비용이 소요된다. 최근 완성차 업체들은 자사만의 내구성 평가방법을 개발하고 수정 보완하는데 많은 노력을 기울이고 있다. 본 연구는 토션빔 액슬의 내구성 평가를 위한 통합 CAE 기법을 개발함에 있어 세계적인 자동차 업체의 정형화된 CAE 기법과의 비교를 통해 경제성을 평가하고 실험적 방법을 통해 얻은 데이터와의 비교를 통해 신뢰성을 확보하는 것을 목표로 하였다. 이를 위해 현재까지 널리 사용되어 온 준정적 내구해석의 과정 및 결과에서 보완점과 문제점을 분석하였고, 업계의 요구사항을 면밀히 검토하여 정규모드해석을 통해 다물체 동역학 모델을 구성하고 이를 이용한 동역학 해석을 진행한 후 그 결과를 이용하여 내구해석인 공진 내구해석 기법을 제안하였다.

Keywords

References

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