Selection of efficient coordinate partitioning methods in flexible multibody systems

탄성 시스템에서의 효율적인 좌표분할법 선정에 관한 연구

  • Kim, Oe-Jo (Dept.of Mechanical Engineering, Graduate School of Busan National University) ;
  • Yoo, Wan-Suk (Busan National University)
  • 김외조 (부산대학교 대학원 기계공학부) ;
  • 유완석 (부산대학교 기계공학부)
  • Published : 1997.08.01


In multibody dynamics, differential and algebraic equations which can satisfy both equation of motion and kinematic constraint equation should be solved. To solve these equations, coordinate partitioning method and constraint stabilization method are commonly used. In the coordinate partitioning method, the coordinates are divided into independent and dependent and coordinates. The most typical coordinate partitioning method are LU decomposition, QR decomposition, and SVD (singular value decomposition). The objective of this research is to find an efficient coordinate partitioning method in the dynamic analysis of flexible multibody systems. Comparing two coordinate partitioning methods, i.e. LU and QR decomposition in the flexible multibody systems, a new hybrid coordinate partitioning method is suggested for the flexible multibody analysis.


Flexible Multibody System;Modal Coordinates;Coordinate Partitioning;LU Decomposition;QR Decomposition


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