动车组抗侧滚扭杆载荷特性

为获得抗侧滚扭杆在动车组运行时所受载荷的变化情况，结合陀螺仪和速度信号，研究了抗侧滚扭杆载荷随列车运行速度、曲线半径和曲线超高的变化规律；统计了不同速度级下抗侧滚扭杆载荷最值，并编制测试载荷谱、趋势载荷谱和动态载荷谱，计算趋势载荷与动态载荷在整个测试载荷中贡献的损伤比. 研究结果表明:直线工况下，抗侧滚扭杆动态载荷幅值随列车运行速度的增加而增加，当运行速度由250 km/h增大到350 km/h时，抗侧滚扭杆载荷幅值最大值增大了30%；在一定的过超高条件下，抗侧滚扭杆趋势载荷幅值随曲线半径减小而减小，240 km/h运行速度下最大载荷幅值由6.61 kN减小为3.54 kN；在曲线半径一定的条件下，抗侧滚扭杆趋势载荷幅值随曲线超高的增大而增大，240 km/h运行速度下最大载荷幅值由3.36 kN增大为5.80 kN. 

Load Characteristics of Anti-rolling Torsion Bar of High-Speed Train

In order to obtain the load characteristics of the anti-rolling torsion bar during the high-speed train operation, first, the change rules of the load with the train speed, curve radius, and curve superelevation were studied by combining the gyroscope and the speed signal. Second, the maximum loads of the anti-rolling torsion bar at different speed levels were obtained, and the load spectrum, trend load spectrum, and dynamic load spectrum were compiled to calculate the damage ratio of the trend load to dynamic load in the whole test load. The results show that the dynamic load amplitude of the anti-rolling torsion bar increases with the increasing of the train running speed under straight running condition. When the speed increases from 250 km/h to 350 km/h, the maximum load amplitude increases by 30%. At a given surplus superelevation condition, the maximum trend load amplitude of the anti-roll torsion bar decreases with the decreasing of the curve radius, which is from 6.61 kN to 3.54 kN at the operation speed of 240 km/h. For the same curve radius, the trend load amplitude increases with the increasing of the curve superelevation and the maximum load amplitude increases from 3.36 kN to 5.80 kN at the operation speed of 240 km/h.