The natural frequency is a critical parameter of structure vibration; it is the foundation to investigate the dynamic response of composite beam.

而结构动力特性中的自振频率是反映结构自身特点的重要参数，是研究组合梁动力学问题的基础。

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The approximate formulas for the natural frequency of bridge piers with shallow foundation, pile foundation and sunk shaft foundation were derived by the Rayleigh Method.

采用瑞利法，导出了计算浅平基桥墩、桩基桥墩及沉井基础桥墩基频的近似公式。

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The natural frequency is an important parameter of building, it reflects the structural dynamic feature and lays the foundation of seismic design.

频率是结构固有的重要参数，它反映了结构的动力特性，也是结构抗震设计的重要基础。

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