摘要
为了识别桥上移动荷载,把车/桥系统抽象为承受一组移动荷载的简支梁,用有限元方法建立桥梁振动方程,根据测试的桥梁响应,由广义正交函数根据模态叠加原理确定模态响应及其导数,用正则化技巧得到稳定的识别结果。数值模拟和试验结果表明,该方法用于识别桥上移动荷载是有效的。
In order to identify moving loads on a bridge, the vehicle/bridge system is modeled as a simply supported beam subjected moving loads. The equation of motion of bridge is set up by finite element method. Based on the measured bridge responses, generalized orthogonal function approach and model superposition principle are used to obtain the derivatives of the modal responses, and the regularization technique is used to obtain the stable identified results. Simulation results and laboratory tests show that the method is effective and accurate to identify the moving loads on the bridge.
出处
《振动．测试与诊断》
EI
CSCD
2005年第1期36-39,共4页
Journal of Vibration,Measurement & Diagnosis
基金
香港研究发展资助局资助项目 (编号 :Poly U 5 0 4 3/ 0 2 E)
关键词
移动荷载
有限元方法
广义正交函数
正则化技巧
识别
响应
moving load finite element method generalized orthogonal function regularization technique identification response
