工程结构随机振动响应谱分析研究

On the Response Spectrum Analysis of Simple Structures Subjected to Random Excitation

目的简要介绍随机振动响应分析的有限元谱分析方法．方法通过梁和矩形板在各种随机激励下的响应计算完成了对ＰＡＬ２／ＲＡＮＤ２有限元计算软件的全面验证和考核．在此基础上用该软件完成了再入飞行器底遮板在底部脉动压力作用下的响应计算．结果计算结果与试验结果相比较，两者基本相符，为今后工程上的实际应用打下了良好的基础．结论ＰＡＬ２／ＲＡＮＤ２可以作为一种工具应用于工程结构随机振动响应谱分析．

Aim\ To describe the FEM of spectrum analysis of random vibration response Methods Through the random vibration response analyses of beams and rectangular plates subjected to the various excitations, the FEM software PAL2/RAND2 was verified thoroughly After this, the random vibration response analysis of the basecover exposed to fluctuating air pressure was finished using PAL2/RAND2 Results The calculating results are identical with the experimental results Conclusion The FEM software PAL2/RAND2 can be used to the analysis of simple structures subjected to random excitation