Based on the analysis of the lateral acceleration data of vehicles measured in Shanghai Metro Lin, this paper suggests t摘要根据铁路车辆及上海轨道交通3号线上实测车辆横向加速度值，建议横向摇摆力取轴重的10%，按目前承轨合构造，车辆偶然脱轨后可能横向偏移左右各1.75m。