提供一种间接计算离散化包装耦合体动刚度的逆子结构分析计算方法，依据矩阵理论推导了计算公式。
An indirect inverse substructure scheme for calculating the dynamic stiffness of discrete coupling unit-of-packaging was introduced. A formula was derived based on matrix theory.
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。
In this thesis, 3-d coupling vibrations of internal combustion engine shafting are presented basing on dynamic stiffness matrix and precise time-integration method.
所得到的刚度矩阵表明，只有当忽略翘曲变形对截面转角的影响时，轴向拉压才只与水平弯曲及竖向弯曲相耦合，而与约束扭转不再耦合。
It is shown that, when the effect of warping on rotation Angle is neglected, tension (or compression) is only coupled with horizontal bending and vertical bending instead of constrained torsion.
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