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本文首先归纳了计算结构自振频率和振型灵敏度的方法。
Various methods for calculating the derivatives of structural characteristic frequencies and modes are summarized based on which the derivative expressions of sinusoidal responses are also derived.
结果表明：结构自振频率随着节点相对刚度比的增加不断增大，当节点相对刚度比在0。
The results indicate that the natural frequencies are increased with adding the relative stiffness ratio, and the change is apparent when the ratio varies between 0.
对于各层结构不同的高层建筑、应用结构摄动理论取得了结构自振频率的修正计算公式。
For different story units of structure, the theory of structural perturbations is used. The correct calculation formulation of free vibration frequency is obtained.
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