计算力学学报2019，Vol.36Issue(1)：65-70,6.DOI:10.7511/jslx20170925001
移动随机荷载作用下梁桥非平稳随机振动的PEM-FFT方法
PEM-FFT for non-stationary random vibration analysis of simple -supported beam bridge under moving random load
摘要
Abstract
A frequency domain analysis method for non-stationary random vibration of bridge structures under moving random loads is presented.Unlike the time-frequency analysis methods for non-stationary random vibration, the proposed method is fully implemented in frequency domain.One of the main features of this method is capable of getting the relationship between random input and random output in frequency domain, which shows that the analysis of non-stationary random vibration caused by a moving load only needs to compute the moving function item as the determined part of input loads.The numerical example is about a simple-supported beam of a constant or variable cross section under moving random load.First of all, the time-frequency analysis method is used to validate the proposed method, and then the effect of the moving loads at different speeds and structures on the response of the statistical variables is analysed.关键词
移动随机载荷/非平稳/随机振动/频域分析/虚拟激励-傅里叶变换方法Key words
moving random load/non-stationary/random vibration/frequency domain analysis/PEM-FFT分类
数理科学引用本文复制引用
赵岩,周瑞鹏,贾甜..移动随机荷载作用下梁桥非平稳随机振动的PEM-FFT方法[J].计算力学学报,2019,36(1):65-70,6.基金项目
国家自然科学基金 (11772084) （11772084）
中央高校基本科研业务费 (DUT17ZD311) （DUT17ZD311）
973计划 (2015CB057804) 资助项目. （2015CB057804）
