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应用线性分布参数系统的谱方法，建立了变截面悬臂剪切杆自由振动及地震反应的方便计算方法，为计算各类截面杆件的地震反应提供了一个有效的途径。这一方法适用于截面沿长度任意变化的杆件。这种截面上的变化可以是解析函数，也可是实测值，因而有较强适用性，数值计算结果表明这个方法具有较好的计算精度。
By using the spectral method of the linear distributed parameter system, a convenient calculation method for the free vibration and seismic response of the variable cross-section cantilevered shear bar is established, which provides an effective way to calculate the seismic responses of various cross-section members. This method is applicable to bars with arbitrary changes in section length. This change in cross-section can be an analytical function, or it can be an actual measurement value. Therefore, it has strong applicability. Numerical calculation results show that this method has a good calculation accuracy.