磁悬浮轨道梁刚度对列车走行性影响研究

高速磁悬浮列车过桥为移动的均布荷载过桥 ,它与铁路车辆集中荷载过桥不同。磁浮列车整车模型和移动荷载模型过桥的有限元仿真分析证实在轨道梁第一阶自振频率 f接近磁浮列车速度与轨道梁跨长之比接近v/L时 ,轨道梁动力响应最大。桥梁动力响应随着轨道梁刚度增加而减小 ,当轨道梁第一阶竖向自振频率大于vmax/L时 ,轨道梁不会出现剧烈振动 ,再增加轨道梁刚度不能有效地减小振动

Impact of Rigidity of Maglev Track Beam on Running of Train

The passing of high speed maglev over bridges features equalized traveling load instead of centralized load of common trains. The finite element emulation analysis of train model and traveling load model indicates that, the dynamic response of track beam reaches maximum when the primary free vibration frequency of track beam f approaches the speed to track beam span ratio v/L. The dynamic response of bridges decreases as rigidity of track beam increases. When the primary vertical free vibration frequency of track beam exceeds V max/L, no severe vibration of track beam will occur, and further increase of track beam rigidity will not reduce its vibration effectively.