本文从复模态理论出发，探讨了在机床模态分析中，应用脉冲激振法激励机床时的一些问题。
Based on the complex modal theory, some problems arising in machine tool modal analysis by impulse excitation are examined.
揭示了系统所受的是低频激励，以非线性复模态的形式作随机振动。
It is found that the system is subjected to the low-frequency excitation and occurs random vibration in the non-linear complex-mode form.
结合复功率流法的概念和有效导纳的研究思想，提出了适合于复杂激励复杂连接系统功率传递规律研究的新理论、新方法——有效导纳功率流法。
Effective Mobility power Flow Method is presented, which is a new theory and is applicable in research of the power transfer principle of complex connected systems with complicated excitation.
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