In this thesis, 3-d coupling vibrations of internal combustion engine shafting are presented basing on dynamic stiffness matrix and precise time-integrationmethod.
本论文以动态刚度矩阵和精细时程积分法为基础，分析了内燃机轴系的三维耦合振动形式。
2
To overcome the difficulties in the solving process brought by the multi-modal damping model, the modal transformation strategy and the precise time-integrationmethod are applied.
采用了模态变换和精细积分法，解决了考虑多阶模态的阻尼矩阵给求解所带来的困难。
3
The multiple scale method (MSM) is introduced to analyze the characteristics of cable's vibration, and the precise time-integrationmethod (PTIM) is used to solve vibration equations.