中文摘要：

建立了250km／h高速综合检测车车体结构，包括车底BTM吊装座的有限元模型，利用轨道车辆随机振动及应力高效算法程序，采用德国高速低干扰谱作为激励载荷，进行整车包括BTM吊装座随机应力分析．随着速度的增加，车体最大值点的应力标准差也随之增加，最大值为0．5452MPa，出现在1Hz处、7Hz处也出现第二峰值，车下吊装座BTM的应力标准差也随之增大最大值7．4191MPa变化达35．9％．

英文摘要：

A BTM of comprehensive inspection train is constructed, and an accurate railway vehicles random vibration analysis method is employed to conduct random stress analysis, taking German low interference spec- trum as load at five different speeds. With increasing speed, standard the maximum stress deviation of the car body increases, with the maximum value of 0. 5452 MPa at 1 Hz. A second peak is located at 7Hz, and the maximum stress of the standard deviation is increased to 7. 4191 MPa.