分析了裂纹转子在非线性涡动影响下的动力学行为，特别是系统响应的分叉与混沌特性。

A cracked rotor with nonlinear influences of whirl speed is investigated, with particular focus on the behaviors of bifurcation and chaos.

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获得了作用在恢复弹簧上的冲击激励，为弹簧的动塑性分析提供了运动边界条件，掌握了弹射系统的动力学特性。

Thus, the impact excitation acting on the restoring spring is obtained, and the dynamic characteristic of the ejection system is acquired.

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采用阻尼影响抽取法研究了围岩动刚度的动力特性 ，提出了岩石地下结构抗震分析的实用算法。

The dynamic characteristics of surrounding rocks are not only concerned with their constraint on underground structure, but also related to the earthquake input in the dynamic interaction analysis.

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