At last, ITD method based on free acceleration response is used to identify mode parameters, frequencies and modal.
最后利用基于加速度响应的ITD法识别结构的模态参数：频率和振型等。
2
Structural free vibration characterization and seismic response were calculated by means of beam-plate linear mathematical model of finite element method.
采用梁、板线性有限元数学模型计算了结构自振特性和地震响应。
3
A new method of estimating characteristic parameters for continuous spectrum of response signal of damped free vibration is presented in this paper.