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文章阐述了 SAP5程序在组合结构中计算频率响应和脉冲响应的具体应用。对于大型复杂结构的计算,采用子结构的方法进行计算。运用(?)代结构动力学中的实验与分析相关的原理建立合适的力学模型,划分合理的单元,选取合理的阻尼比。应用 SAP5程序中的时间历程响应计算的 NDYN=2和频率响应计算的 NDYN=5的功能块,用频率扫瞄和脉冲响应的方法进行了模态分析和响应计算,输出了位移和应力响应的最大值与其对应的频率。对计算结果与用解析法计算的固有频率和实验中测得的数值作了比较。文章采用表格形式输入脉冲激励计算脉冲响应时间历程,此法是对应于模志试验中的锤击法的,具有重要工程意义。
The article expounds the concrete application of SAP5 program in calculating the frequency response and impulse response in the composite structure. For the calculation of large and complex structures, sub-structure method is used to calculate. The appropriate mechanics model is established by using the principles of experiment and analysis in structural dynamics on behalf of (?), Dividing the reasonable units and selecting the reasonable damping ratio. The time history in SAP5 program is used to perform the modal analysis and response calculation in response to the calculated NDYN = 2 and NDYN = 5 calculated by frequency response, and the displacement and stress responses are output The maximum value corresponds to the frequency. The calculated results are compared with the natural frequencies calculated using the analytical method and the values measured in the experiment. The article uses the form of pulse input excitation to calculate the impulse response time history, this method is corresponding to the hammer test in the model test, has important engineering significance.