以车辆-轨道耦合动力学理论为基础,结合移动式线路动态加载试验车在京广高铁线路测试的试验数据,利用有限元软件ANSYS和多体动力学软件SIMPACK建立联合仿真模型,分析运行速度为200,250,300,350 km/h时,不同轨道整体刚度下车辆和轨道的...以车辆-轨道耦合动力学理论为基础,结合移动式线路动态加载试验车在京广高铁线路测试的试验数据,利用有限元软件ANSYS和多体动力学软件SIMPACK建立联合仿真模型,分析运行速度为200,250,300,350 km/h时,不同轨道整体刚度下车辆和轨道的动力性能。计算结果表明:车辆运行速度为300 km/h时,轨道整体刚度宜控制在75~100 k N/mm;车辆运行速度为250或200 km/h时,轨道整体刚度宜控制在65~100 k N/mm。研究结果可为高速铁路线路的养护维修更加合理的轨道刚度设计提供依据。展开更多
Two trains passing each other is controlling factor for the wind-vehicle-bridge systems.To test the aerodynamic characteristics of moving vehicles under crosswinds when two trains are passing each other,a wind tunnel ...Two trains passing each other is controlling factor for the wind-vehicle-bridge systems.To test the aerodynamic characteristics of moving vehicles under crosswinds when two trains are passing each other,a wind tunnel test device,which has two moving tracks,was developed.The rationality of the test result was discussed,the effects of intersection mode,yaw angle and lane spacing on the aerodynamic coefficients of the leeward train were analyzed,and the difference of aerodynamic coefficients between the head vehicle and the tail vehicle was discussed.The results show that the proposed test device has good repeatability.The intersection modes have a certain effect on the aerodynamic force of the leeward train when two trains are passing each other,and the results should be more reasonable during the two trains dynamic passing each other.With the decrease of yaw angle,the sudden change of train aerodynamic coefficients is more obvious.The decrease of lane spacing will increase the sudden change of leeward vehicles.In the process of two trains passing each other,the aerodynamic coefficients of the head vehicle and tail vehicle are significantly different,so the coupling vibration analysis of wind-vehicle-bridge system should be considered separately.展开更多
文摘以车辆-轨道耦合动力学理论为基础,结合移动式线路动态加载试验车在京广高铁线路测试的试验数据,利用有限元软件ANSYS和多体动力学软件SIMPACK建立联合仿真模型,分析运行速度为200,250,300,350 km/h时,不同轨道整体刚度下车辆和轨道的动力性能。计算结果表明:车辆运行速度为300 km/h时,轨道整体刚度宜控制在75~100 k N/mm;车辆运行速度为250或200 km/h时,轨道整体刚度宜控制在65~100 k N/mm。研究结果可为高速铁路线路的养护维修更加合理的轨道刚度设计提供依据。
基金Projects(51778544,51978589,51908472) supported by the National Natural Science Foundation of ChinaProject(2682021CG014) supported by the Fundamental Research Funds for the Central Universities,China。
文摘Two trains passing each other is controlling factor for the wind-vehicle-bridge systems.To test the aerodynamic characteristics of moving vehicles under crosswinds when two trains are passing each other,a wind tunnel test device,which has two moving tracks,was developed.The rationality of the test result was discussed,the effects of intersection mode,yaw angle and lane spacing on the aerodynamic coefficients of the leeward train were analyzed,and the difference of aerodynamic coefficients between the head vehicle and the tail vehicle was discussed.The results show that the proposed test device has good repeatability.The intersection modes have a certain effect on the aerodynamic force of the leeward train when two trains are passing each other,and the results should be more reasonable during the two trains dynamic passing each other.With the decrease of yaw angle,the sudden change of train aerodynamic coefficients is more obvious.The decrease of lane spacing will increase the sudden change of leeward vehicles.In the process of two trains passing each other,the aerodynamic coefficients of the head vehicle and tail vehicle are significantly different,so the coupling vibration analysis of wind-vehicle-bridge system should be considered separately.