【作者】 王鑫；

【导师】 罗仁；

【作者基本信息】 西南交通大学 ， 交通运输（专业学位）， 2024， 硕士

【摘要】 针对目前高温超导磁悬浮车辆悬挂结构研究较少,存在车辆悬挂结构、悬挂参数取值和工程设计指标尚不明确的问题。本文首先建立了高温超导磁浮车辆仿真所需要的磁轨力元数学模型,在国产多体动力学软件DAP-rail中编写磁轨力元,建立了三种不同悬挂结构方案的车辆模型;然后,开展车辆动力学仿真对比,优选悬挂设计方案,分析悬挂参数对车辆运行影响规律,优化关键悬挂参数;最后,开展了轨道不平顺激扰对车辆运行影响规律分析,研究高温超导磁浮车辆动态限界计算方法,为高温超导线路设计提供参考。主要开展了以下工作:(1)利用高温超导磁浮部分表征参数,建立了超导块材参数化磁轨力元模型,通过振动仿真分析验证了块材力元模型的准确性。建立了杜瓦与Halbach型永磁轨道的磁轨力元模型,通过振动仿真分析验证了杜瓦力元模型的准确性。最终建立横垂耦合杜瓦磁轨力元模型,编写进国产多体动力学DAP-rail软件中,作为高温超导磁浮车辆动力学仿真的基础磁轨力元。(2)在DAP-rail中建立了一级悬挂6悬浮架、两级悬挂6悬浮架以及两级悬挂4悬浮架三种不同悬挂结构的高温超导磁浮车辆动力学模型。结合参数化磁轨力元,开展车辆动力学仿真,对比了各悬挂方案的车辆在高速运行、曲线通过和抗侧风性能方面的动力学表现,考虑车辆运行平稳性和运行安全性,优选出两级悬挂4悬浮架车辆结构。选取一系、二系悬挂刚度及阻尼,开展车辆动力学仿真,对比优化主要悬挂参数,给出悬挂参数的合理取值范围。(3)针对实际永磁轨道线路特点,模拟典型波长的轨道不平顺激励,开展了车辆动力学仿真,从车辆运行安全性及悬浮架振动加速度方面,分析了高温超导磁浮车辆在典型轨道不平顺波长和幅值下的动态响应,研究发现中等波长轨道不平顺对车辆动力学影响较大,给出轨道设计和维护中对不平顺控制的建议。(4)开展了高温超导磁浮车辆动态限界研究,推导了两级悬挂结构的高温超导磁浮车辆限界计算公式。通过DAP-rail软件仿真高温超导磁浮车辆运行姿态,结合车辆制造维护误差,计算得到高温超导磁浮车辆的动态包络线,给出了高温超导磁浮列车的车辆限界。更多还原

【Abstract】 Some existing studies lack sufficient investigation into the suspension structure of high-temperature superconducting maglev vehicles,and there is still uncertainty regarding the suspension structure,suspension parameter values,and engineering design criteria.To address this,this thesis first establishes the mathematical model,then writes force model needed for the simulation of HTS maglev vehicles into the domestic multi-body dynamics software DAP-rail,where vehicle models for three different suspension structure schemes are established.Through comparative dynamic simulation of these vehicles,the thesis selects an optimal suspension design scheme and analyzes the effects of suspension parameters on vehicle operation to optimize key suspension parameters.This thesis also examines the impact of permanent magnet guideway(PMG)irregularities on vehicle operation and conducts a study on the dynamic gauge of HTS maglev vehicles,which providing references for the design of HTS lines.The main works are as follow:(1)Utilizing characteristic parameters of HTS,a parameterized force model for HTS bulks was established.The accuracy of the bulk force model was verified through vibration simulation analysis.The force models for HTS dewars and Halbach-type PMG were also established,with the accuracy of the force model confirmed through vibration simulation analysis.Ultimately,a coupled transverse-vertical force model of HTS dewar was established and written into the domestic multi-body dynamics software DAP-rail as the basic HTS dewars-PMG force model for the simulation of HTS maglev vehicles.(2)Within DAP-rail,HTS vehicle models with three different suspension structures were established:a primary suspension with six suspension frames,a dual-stage suspension with six suspension frames,and a dual-stage suspension with four suspension frames.By incorporating the parameterized HTS dewars-PMG force model,HTS vehicle dynamics simulations were conducted.The dynamic performance of each scheme was compared in terms of high-speed operation,curve negotiation,and lateral wind resistance.From the perspectives of vehicle operational stability and safety,the dual-stage suspension with four suspension frames was selected as the optimal vehicle structure.A comparison and optimization of primary and secondary suspension stiffness and damping were conducted to determine a reasonable range of suspension parameters.(3)Considering the characteristics of actual PMG,simulations of typical track irregularity wavelengths were conducted to perform vehicle dynamics simulations.The dynamic responses of HTS maglev vehicles under typical track irregularity wavelengths and amplitudes were analyzed from the perspectives of vehicle operational safety and suspension frame vibration acceleration.It was found that medium-length track irregularities have a significant impact on vehicle dynamics,and recommendations for track design were provided.(4)A study on the dynamic gauge of HTS maglev vehicles was conducted,deriving a formula for calculating the dynamic gauge of vehicles with a dual-stage suspension structure.Using DAP-rail software to simulate the operating posture of HTS maglev vehicles and considering manufacturing and maintenance errors,the dynamic envelope of HTS maglev vehicle operation was obtained,providing the dynamic gauge for HTS maglev vehicles.更多还原