Vehicle Dynamic Analysis Using Nonlinear Finite Element Analysis Program(LS-DYNA)

비선형 유한요소 해석프로그램(LS-DYNA)을 이용한 차량 동력학해석

  • Min, Han-Ki ;
  • Lee, Hyun ;
  • Yang, In-Young
  • 민한기 ;
  • 이현 ;
  • 양인영
  • Published : 2002.09.01

Abstract

Structural integrity of either a passenger car or a light truck is one of the basic requirements for a full vehicle engineering and development program. The results of the vehicle product performance are measured in terms of ride and handling, durability, noise/vibration/harshness(NVH), crashworthiness and occupant safety. The level of performance of a vehicle directly affects the marketability, profitability and, most importantly, the future of the automobile manufacturer. In this study, we used the virtual proving ground(VPG) approach for obtaining the dynamic characteristics. VPG approach uses a nonlinear, dynamic, finite element code(LS-DYNA3D) which expands the application boundary outside the classic linear, antic assumptions. VPG approach also uses realistic boundary conditions of tire/road surface interactions. To verify the predicted dynamic results, a single lane change test has been performed. The prediction results were compared with the experimental test results, and the feasibility of the integrated CAE analysis methodology was verified.

Keywords

handling;noise/vibration/harshness;VPG approach;dynamic characteristics;lane change

References

  1. W. S. Yoo and E. J. Haug, 'Dynamics of flexible mechanical systems using finite element lumped mss approximation and static correction modes,' Technical Report 85-7, University of lowa
  2. J.S. Majcher, R.D. Michaleson, and A.R. Solomon, 'Analysis of vehicle suspensions with static and dynamic computer simulation,' SAE paper No. 76183
  3. A. Tang, A. Farahani, and T. Palmer, Kinematic and dynamic nonlinear finite element analysis of a multibody linkage system using LS-DYNA , The 3rd International LS-DYNA Conference, Kyoto, Japan, Nov., 1995
  4. Z. H. Zhong, Finite element procedures for contact-impact problems, Division of Solid Mecha-nics, Department of Mechanical Engineering, Linkoping University, Sweden, 1993
  5. eta/VPG users processor manual, ETA, 1133 E. Maple Rd., suite 200 Troy, MI 48083 USA
  6. LS-DYNA users manual, LSTC, Livermore, Califomia 94550
  7. G. S. Choi, H. K. Min, S. H Paik, 'Dynamic stress analysis of vehicle using virtual proving ground approach,' SAE Technical paper Sries 2000-01-0121,2000
  8. Y. Zhang and A. Tang, 'The CAE revolution and the development of the virtual proving ground approach,' The 4th Intemational LS-DYNA Conference, Minneapolis, Miimesota, Sept, 1996
  9. Y. Zhang and A. Tang, 'Validation of a FEA tire model for vehicle dynamic analysis and full vehicle real time proving ground simulations,' SAE Paper No. 971100, 1997