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

The Korean Society of Mechanical Engineers (대한기계학회)
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Analysis of Vibration Characteristics of a Full Vehicle Model Using Substructure Synthesis Method

부분구조합성법을 이용한 전차량 모델의 진동 특성 분석

  • Kim, Bum-Suk (Department of Mechanical Engineering, Hanyang University) ;
  • Kim, Bong-Soo (Corporate Research & Development Division, Hyundai-kia Motors Company) ;
  • Yoo, Hong-Hee (Department of Mechanical Engineering, Hanyang University)
  • 김범석 (한양대학교 기계공학과) ;
  • 김봉수 (현대기아자동차 연구개발총괄본부) ;
  • 유홍희 (한양대학교 기계공학과)
  • Received : 2009.07.22
  • Accepted : 2010.03.13
  • Published : 2010.05.01
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Abstract

The finite element (FE) method is generally used to model and simulate the physical behavior of large structures, such as passenger vehicles or aircraft. However, FE analysis involves a very large computation time and cost for developing the analysis model. Therefore, the vibration characteristics of large structural systems are often analyzed using the component mode synthesis (CMS) method, which is one of the substructure synthesis methods. In this study, the vibration characteristics of passenger vehicles are analyzed by using the substructure synthesis method. A passenger vehicle model, which includes a vehicle body, suspension systems, and a sub-frame, is presented. The physical components of the vehicle system are modeled as equivalent substructures using the Craig-Bampton method of CMS. The vibration characteristics, such as the natural frequencies and mode shapes and frequency response, of the vehicle system are determined. The effects of variations in some design parameters on the vibration characteristics of the full vehicle model are also investigated.

승용 차량과 항공기와 같은 대형 구조물에 대한 해석에는 유한요소법이 일반적으로 사용되고 있다. 그러나 대형 구조물을 유한요소로 모델화 하여 해석하는 경우에는 자유도의 수가 수천에서 수만에 이르게 되어 이를 직접 해석하기 위해서는 많은 시간과 노력이 필요하다. 따라서 차량 모델과 같은 대형 복잡 구조물을 효율적으로 해석하기 위해 부분구조 합성법이 많이 사용되고 있다. 본 연구에서는 Craig-Bampton 방법을 이용한 전차량 모델링 방법을 제안하고 전차량 모델의 진동 특성을 분석하였다. 차량 모델을 구성하는 각 부분을 각각 부분구조 모델로 치환한 후 다시 합성하여 전차량 모델을 구성하였다. 또한, 서브프레임 주요 설계변수, 즉 마운트 위치나 프레임 크기의 편차가 전체 시스템의 모드 특성의 통계적 변화에 미치는 영향을 살펴보았다.

Keywords

References

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