电机悬挂方式对LIM地铁系统动力特性的影响研究

研究目的：研究直线电机地铁在不同电机悬挂方式下的气隙变化规律及车辆、轨道的动力响应特性，并将二者进行比较。研究方法：应用车辆轨道耦合动力学理论，分别建立不同悬挂方式下的系统模型并编制相应的仿真程序，通过在轨道局部加入谐波型余弦不平顺激励对系统的动力特性进行分析。研究结果：2种悬挂方式对系统的各向加速度和轮轨力的影响差别较小，而气隙变化呈现明显不同的规律。研究结论：直线电机采用架悬式悬挂时，要严格控制幅值大于5．5mm的长波不平顺，防止电机和反力板之问的刮蹭；而当采用抱轴式悬挂时，要注意控制大幅值的短波不平顺出现，防止气隙过大，影响电机效率。

Study of Suspension Mode Influences on LIM Metro System Dynamic Characters

Research purposes: Air gap variations,vehicle and track dynamic response characters are analyzed and compared of different suspension mode on linear metro system.Research methods:Vehicle/track coupling dynamics theory is applied and different model is built based on different suspension mode.Harmonic cosine forms of irregularities are introduced to local track.Research results:The acceleration in different direction and wheel/track force has small differences under different suspension mode,but the law of air gap variations appear sharp different.Research conclusions:Under bogie suspension,long-wave irregularity with over 5.5 mm amplitude must be strictly controlled to avoid the scrape between LIM and reaction board.Under nose suspension,short-wave irregularity with large amplitude should be restricted to avoid large air gap that influences the efficiency of LIM.