航天器环境工程2017，Vol.34Issue(6)：604-610,7.DOI:10.3969/j.issn.1673-1379.2017.06.006
基于随机振动响应的结构非线性参数识别
Identification of nonlinear parameters of structure based on
random vibration response
摘要
Abstract
The composite material has typical nonlinear characteristics. Its nonlinear stiffness is very important for the system design and analysis. The random vibration is ubiquitous in the environment, and the identification of nonlinear parameters in the practical environment gives more reasonable results. A method of identification of nonlinear parameters based on the random decrement method and the continuous wavelet transform is presented. And a program of identifying the nonlinear stiffness based on the random vibration response is developed. A numerical example of a single freedom nonlinear system with cube stiffness is given to validate the method and the program. The nonlinear characteristics of the typical composite material structure are studied. It is shown that the method of identification of nonlinear parameters enjoys a high precision, and different resonant order of a multi freedom system has different nonlinear characteristics. The present method is useful for the nonlinear parameter identifying and modeling in a random vibration environment.关键词
非线性刚度/随机减量法/连续小波变换/计算分析/试验验证Key words
nonlinear stiffness/random decrement method/continuous wavelet transformation/simulation analysis/test validation分类
数理科学引用本文复制引用
张鹏飞,付玮,苏华昌,吴家驹..基于随机振动响应的结构非线性参数识别[J].航天器环境工程,2017,34(6):604-610,7.
