可用于进行任意自由度的结构的动力时程分析，求解结构的动力响应，包含位移、速度以及加速度，然后对其进行傅里叶变换到频域，可通过滤波函数去除无关频率(The dynamic time history analysis of a structure with arbitrary degree of freedom can be used to solve the dynamic response of the structure, including the displacement, velocity and acceleration, then the Fourier transform to the frequency domain, and the unrelated frequency can be removed by the filter function.)