作者：苏荣华, 王婷, 裴忠强

作者单位：辽宁工程技术大学力学与工程科学系, 辽宁阜新 123000

关键词：随机结构; 模态频率; 相关分析; 物理参数变异

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(=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。

Correlation analysis of modal frequencies and physical parameters in stochastic structure

SU Rong-hua, WANG Ting, PEI Zhong-qiang

Department of Mechanics and Engineering Sciences, Liaoning Technical University, Fuxin 123000, China

Abstract: 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 element method. The results of numerical experimentation indicate that the modes become sparse, and cross-correlation coefficients between modal frequencies and stochastic phy sical parameters are varied with the increasing (1% to 30%) of variability of physical parameters.

Keywords: Stochastic structure; Modal frequency; Correlation analysis; Variation of physical parameters

2005, 31(5): 109-110  收稿日期: 2004-9-28;收到修改稿日期: 2005-1-7

基金项目: 

作者简介: 苏荣华(1965-),女,工程力学在读博士,教授,主要从事力学与工程科学研究。

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