中低速磁浮列车-大跨度连续梁耦合振动研究

Coupling Vibration Study of Medium-low Speed Maglev Train-Long Span Continuous Bridge System

研究目的:本文针对目前世界上最大跨度中低速磁浮桥梁,建立中低速磁浮车辆-控制器-桥梁系统耦合动力学模型,考虑轨道不平顺的影响,研究3节编组中低速磁浮列车以不同速度、不同车辆载荷(空载、定员和超员状态)通过桥梁时车辆和桥梁的竖向动力响应,评价主跨110 m中低速磁浮连续梁车桥系统的动力性能。研究结论:(1)车体的最大垂向加速度为0.447 m/s^2,Sperling舒适度指标最大值为1.664,垂向乘坐舒适度达到"优";(2)悬浮间隙最大波动值为2.26 mm,除车速100 km/h外,其余工况波动值均在2 mm以内,悬浮系统具有足够的悬浮稳定性;(3)梁体跨中最大竖向加速度为0.065 m/s^2,远远小于限值0.5g;(4)本研究成果可为大跨度中低速磁浮桥梁的设计和应用提供参考。

Research purposes： In this paper, the coupling suspension controller -bridge system is established for the dynamics model of medium - low speed maglev vehicle - largest span medium -low speed maglev bridge in the world Considering the influence of track irregularity, the dynamic performance of the medium - low speed maglev vehicle - bridge system with 110 m main span continuous girder is evaluated by the vertical dynamic response of vehicles and bridges at different speeds and different vehicle loads （AW0, AW2 and AW3 ）. Research conclusions： （ 1 ） The maximum vertical acceleration of the vehicle body is 0. 447 m/s^2, the maximum value of the Sperling comfort index is 1. 664, and the vertical ride comfort is ＂excellent＂. （2） The maximum fluctuation value of the suspension gap is 2.26 ram, except for the speed of 100 km/h, the fluctuation of the remaining working conditions is within 2 mm, which shows the suspension system has sufficient suspension stability. （3） The maximum mid - span vertical acceleration of the beam is 0. 065 m/s2, far less than the limit of 0.5g. （4） The research results can provide a reference for the design and application of long - span medium - low speed maglev bridge.