铁道科学与工程学报2017，Vol.14Issue(11)：2363-2368,6.
轨道交通槽形梁局部振动及参数敏感性分析
Research on local vibration and parameter sensitivity analysis of rail transit trough beam
摘要
Abstract
For local vibration problems of rail channel beam, based on the finite element method, the railway channel beam finite element model was established, and the modal analysis was carried out firstly. Then, based on the theory of vehicle-track coupling dynamics, the local channel beam in vibration under train load response was calculated through analysis of the acceleration spectrum curve of five selected output points to obtain the maximum response of transverse vibration of beam flange groove. The maximum acceleration vibration level was found to be 107.2 dB. The vertical beam bottom groove to the vibration acceleration is at 50Hz peak, the transverse vibration of the left and right sides of the flange and web of the response spectrum curve is similar to that of a peak at 12.5 Hz and 40 Hz. In addition, the sensitivity analysis on the local vibration response of the groove beam was also studied. The results show that the thickness of the thickened bottom plate can reduce the vibration response of the groove beam effectively. Greater thickness is not always better, and the best value remains to be further analyzed yet.关键词
槽形梁/有限元/局部振动/敏感性分析Key words
trough beam/finite element/local vibration/sensitivity analysis分类
交通工程引用本文复制引用
刘林芽,秦佳良,曾峰..轨道交通槽形梁局部振动及参数敏感性分析[J].铁道科学与工程学报,2017,14(11):2363-2368,6.基金项目
国家自然科学基金资助项目(51268014,51578238) （51268014,51578238）
江西省"赣鄱英才555工程"领军人才培养计划资助项目 （）
江西省研究生创新专项资金资助项目(YC2016-S248) （YC2016-S248）
