论文部分内容阅读
以轨道结构为例建立了车辆-轨道垂向耦合动力计算模型,并使用Wilson-q数值积分方法得到了轨道结构在列车荷载作用下的随机振动响应。基于随机过程跨越理论,得到了不同跨越假设以及极值分布条件下钢轨动力响应可靠度,并与数值模拟法结果进行比较,表明对于低跨越界限,极值I型分布法的计算结果最接近精确值;对于高界限则高斯分布法效果最好。
Taking the orbital structure as an example, a vehicle-track vertical coupled dynamic calculation model is established and the random vibration response of the orbital structure under the train load is obtained by the Wilson-q numerical integration method. Based on the stochastic process spanning theory, the reliability of the dynamic response of the rail under different cross-over assumptions and extremum distributions is obtained and compared with the numerical simulation results. The results show that the results of the extremal I-type distribution method are closest to the accurate Value; Gaussian distribution method for the high limit of the best.