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直线电机轨道交通系统(LIM系统)具有很多优点,适合于在城市中发展。该文在对车载电机产生的电磁力进行分析的基础上,建立了用于分析LIM列车-桥梁系统振动的动力模型。以一座3跨简支梁桥为工程背景,运用专门编制的计算机程序对LIM列车-桥梁系统的动力响应进行了计算,分析了各种因素对LIM系统的振动影响,并对LIM车辆与桥梁的动力性能进行了评价。计算结果显示:轨道不平顺显著影响抱轴式LIM列车所受的电磁力,磁极气隙的设置、电磁力的大小和方向及列车速度对车桥系统的振动尤其是竖向振动有一定的影响。LIM列车在桥上运行时,车辆的各项动力性能指标完全满足行车安全性和平稳性的要求,桥梁的动力性能指标也符合规范要求。LIM系统具有出色的动力性能。
The Linear Motor Rail Transit System (LIM System) has many advantages and is suitable for development in the city. Based on the analysis of the electromagnetic force generated by on-board motor, a dynamic model for analyzing the vibration of LIM train-bridge system is established. Taking a 3-span simply supported girder bridge as the engineering background, the dynamic response of LIM train-bridge system was calculated with a specially compiled computer program, and the vibration effects of various factors on the LIM system were analyzed. The LIM vehicle and bridge Power performance was evaluated. The calculation results show that the track irregularity significantly affects the electromagnetic force of the axle-holding LIM train, the setting of the air gap, the magnitude and direction of the electromagnetic force, and the train speed have some influence on the vibration of the axle system, especially the vertical vibration . LIM train running on the bridge, the vehicle’s power performance indicators fully meet the traffic safety and stability requirements, the bridge’s dynamic performance indicators also meet regulatory requirements. LIM system has excellent dynamic performance.