城市轨道交通组合梁的动力效应识别

为识别组合梁在城市轨交运营状况下的动力效应,基于现场应力监测数据,通过互相关函数法求解列车行驶速度,并参照规范中的公式计算理论冲击系数,再对比消噪前后数据得到实际冲击系数,从而验证了规范的安全性;同时得到了现实中冲击系数与列车行驶速度间的拟合关系式。所做工作可为实际运营状况下结构的数值与实验模拟打下基础。

Identification of Dynamic Effect of Composite Beam Used in Urban Rail Transit

In order to identify the dynamic effect of the composite beam for the urban rail transit under operation,based on the in-situ stress monitoring data,the cross-correlation function method is used to solve the train speed,and the theoretical impact coefficient is calculated by referring to the formula in the specifications.The actual impact coefficient is obtained by comparing the data before and after noise elimination,and the distribution of the impact coefficient and the train speed is further obtained,which lays a foundation for the numerical and experimental simulation of the structure in actual operation.