通过模态分析，得到立柱和底座的前几阶固有频率和振型。
Modal analyses of the base frame and the vertical column were carried out to investigate their dynamic characters.
根据某大口径望远镜水平轴系的结构设计方案，利用结构分析软件I - DEAS，建立了结构分析模型，求得了水平轴系前几阶固有频率和振型图。
According to the structural design scheme for horizontal shafting of a large-aperture telescope, the structural analysis model is established by means of the structural analysis software I-DEAS.
本文根据原型振动实测的位移记录，应用时间域识别法，求得了结构的前几阶模态的固有频率和阻尼比。
Some modal natural frequencies and damping coefficients of a structure are derived by means of in-sita testing displacement records and the time domain identification technique.
本文根据原型振动实测的位移记录，应用时间域识别法，求得了结构的前几阶模态的固有频率和阻尼比。
Some modal natural frequencies and damping coefficients of a structure are derived by means of in-sita testing displacement records and the time domain identification technique.
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