CAJ | 학술논문

为了探究地震对高速列车和桥梁的影响,建立车辆-桥梁空间耦合系统模型.将规格化的地震波作为激励,同时考虑轨道随机不平顺的影响.采用新型显式积分法求解系统方程.分析不同烈度地震作用下车桥耦合系统的动力响应.数值结果表明,地震烈度在桥梁的抗震设防烈度范围内时,桥梁的振动加速度和挠度响应均符合规范的限值要求.车辆运行平稳性的Sperling指标相对加速度指标较为宽松,当地震烈度为7度及以上时,车辆已不能平稳地运行于桥梁之上.在相对较弱的地震作用下,轨道随机不平顺对桥梁的垂向加速度响应影响明显,不应忽略.
위료탐구지진대고속열차화교량적영향,건립차량-교량공간우합계통모형.장규격화적지진파작위격려,동시고필궤도수궤불평순적영향.채용신형현식적분법구해계통방정.분석불동열도지진작용하차교우합계통적동력향응.수치결과표명,지진열도재교량적항진설방열도범위내시,교량적진동가속도화뇨도향응균부합규범적한치요구.차량운행평은성적Sperling지표상대가속도지표교위관송,당지진열도위7도급이상시,차량이불능평은지운행우교량지상.재상대교약적지진작용하,궤도수궤불평순대교량적수향가속도향응영향명현,불응홀략.
In order to explore the impact of earthquakes on trains and bridges, the model of vehicle-bridge coupled system was established in this study. The normalized seismic wave was a kind of stimulation, meanwhile, the influ-ence of track random irregularity was taken into account. The system equation was solved by new explicit integra-tion method. The dynamic responses of the coupled system of train-bridge under earthquakes of different intensity were analyzed. Numerical results show that both the acceleration and the deflection response of the bridge meet the requirements of norms when earthquakes intensity is within the scope of the bridge's seismic fortification in-tensity. The Sperling index of vehicle stability is relatively looser than acceleration index, and the vehicle can 't run steady on the bridge when seismic intensity is seven degrees or above. The track random irregularity has obvi-ous effects on vertical acceleration of the bridge under a relatively weak earthquake, which shouldn 't be ignored.