随机结构模态频率与物理参数的相关分析  

Correlation analysis of modal frequencies and physical parameters in stochastic structure

作　　者：苏荣华[1] 王婷[1] 裴忠强[1] 

机构地区：[1]辽宁工程技术大学力学与工程科学系,辽宁阜新123000

出　　处：《中国测试技术》2005年第5期109-110,共2页CHINA MEASUREMENT & TESTING TECHNOLOGY

摘　　要：本文应用Monte-Carlo随机有限元方法进行了随机结构系统的模态频率与随机物理参数的相关分析.数值试验表明,在一定的变异范围内(δ＝1%～30%),随着物理参数变异性增大,模态密集程度降低,模态频率与随机物理参数互相关系数发生变化.In this thesis, the correlation of modal frequencies and stochastic physical parameters in random structural system are studied by means of Monte-Carlo stochastic finite dement method.The results of numerical experimentation indicate that the modes become sparse, and cross-correlation coefficients between modal frequencies and stochastic physical parameters are varied with the increasing （1% to 30%）of variability of physical parameters.

关 键 词：随机结构 模态频率 相关分析 物理参数变异 

分 类 号：O212.2[理学—概率论与数理统计]