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| PEM-FFT for non-stationary random vibration analysis of simple-supported beam bridge under moving random load |
| Received:September 25, 2017 Revised:November 18, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20170925001 |
| KeyWord:moving random load non-stationary random vibration frequency domain analysis PEM-FFT |
| Author | Institution |
| 赵岩 |
重庆交通科研设计院 桥梁工程结构动力学国家重点实验室, 重庆 ;大连理工大学 工业装备结构分析国家重点实验室 工程力学系, 大连 |
| 周瑞鹏 |
大连理工大学 工业装备结构分析国家重点实验室 工程力学系, 大连 |
| 贾甜 |
大连理工大学 工业装备结构分析国家重点实验室 工程力学系, 大连 |
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| 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. |