该模型的计算结果表明，立管的模态振型、模态频率与涡激振动响应高度耦合，并且对于低质量比的情况尤为明显。
It shows that the modal shape and mode frequency are highly coupled with the VIV response of a Marine riser with low mass ratio.
本文建立了某型立铣床床身的三维有限元模型，并利用大型有限元分析软件ANSYS进行了模态分析，得出了床身前十阶固有频率和振型。
The paper establishes the 3D finite element model of a lathe-bed and calculates the result of vibration model analysis of it in ANSYS.
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