The differential quadrature-probabilistic collocation(DQ-PEM)method,which combines the virtual excitation method and differential quadrature method,is used to study the non-stationary random response of pedestrian bridges under pedestrian excitation.Different from the previous virtual excitation method,this method,based on the simplified spectral model,establishes the spectral density of the pedes-trian forcing function,to obtain the multi-modal of the multi-degree of freedom system under pedestrian load.The accuracy and effectiveness of the proposed method are verified by the engineering case.Further-more,the stochastic vibration problems of beam-type structures under pedestrian loading at different ve-locities and under various constraint conditions are discussed.
关键词
谱模型/行人荷载/虚拟激励/非平稳随机响应/DQ-PEM方法
Key words
spectral model/pedestrian load/virtual excitation/non-stationary random response/DQ-PEM
维普
万方数据