小车轨道踏面缺陷的多体动力学仿真
Multi-Body Dynamics Simulation of Tread Defects for Trolley Tracks

轨道踏面缺陷是轨道式集装箱门式起重机(简称：轨道吊)上小车轨道缺陷的重要表现形式，准确分析小车轨道踏面的缺陷情况对保障轨道吊的安全运行至关重要。以广州港某轨道吊为研究对象，利用多体动力学软件RecurDyn对轨道踏面的有缺陷工况和无缺陷工况进行动力学仿真，获得两种工况下应力的分布以及小车车轮通过轨道时的振动加速度；将模拟获得的两种振动加速度进行对比分析，得出判断轨道缺陷的方法；将振动加速度的仿真结果与实测结果进行对比分析，验证了动力学仿真模型的可靠性。
Rail tread defects, as a crucial manifestation form of trolley rail defects on rail container gantry crane (rail-mounted crane), being accurately analyzed is of great importance to ensure the safe operation of the rail-mounted gantry. Taking a rail-mounted gantry in Guangzhou port as the research object, utilizing multi-body dynamics software RecurDyn to perform dynamic simulation of the working condition on the two rail treads with or without defects, to get the stress distribution and vibration acceleration of the trolley wheels passing through the rail under the two different conditions. Through the analysis and contrast of the two kinds of vibration acceleration obtained by simulation, the method of judging rail defects was obtained. In addition, the simulation results of vibration acceleration were compared with the measured results to verify the reliability of the dynamic simulation model.