High-speed train running in the sand environment is different from the general environment. In the former situation, there will be sand load applied on high-speed train(SLAHT) caused by sand particles hitting train su...High-speed train running in the sand environment is different from the general environment. In the former situation, there will be sand load applied on high-speed train(SLAHT) caused by sand particles hitting train surface. This will have a great impact on the train stability, running drag and surface corrosion. Numerical simulation method of SLAHT in sand environment is studied. The velocity and mass flow rate models of saltation and suspension sand particles and the calculation model of SLAHT caused by sand particles hitting train surface are established. The discrete phase method is adopted for numerical simulating the process of saltation and suspension sand particles moving to train surface and generating sand load. By comparison with the field tests, the numerical simulation reliability is analysed. The theoretical formula of SLAHT changing with cross-wind and train speed is proposed. SLAHT changing law is analyzed. Research results indicate that SLAHT changing with cross-wind and train speed is a quadratic relationship. When train speed is constant, SLAHT increases quadratically with cross-wind speed improvement. When cross-wind speed is constant, SLAHT increases quadratically with train speed improvement.展开更多
为解决城市轨道交通实物沙盘模型维护维修困难、行车调度作业实训项目不足、企业现场教学容纳能力有限、安全风险高等问题,基于行车调度相关岗位职业能力,设计实训项目和工作任务,利用Unity3D建模、Visual studio C#、虚拟现实技术等工...为解决城市轨道交通实物沙盘模型维护维修困难、行车调度作业实训项目不足、企业现场教学容纳能力有限、安全风险高等问题,基于行车调度相关岗位职业能力,设计实训项目和工作任务,利用Unity3D建模、Visual studio C#、虚拟现实技术等工具,设计开发集城市轨道交通电子虚拟沙盘、虚拟列车和信号仿真模块、多角色协同实训模块等功能于一体的虚拟仿真教学与实训平台,克服了以往实训设备利用率不高、学生兴趣不足等问题。展开更多
文摘High-speed train running in the sand environment is different from the general environment. In the former situation, there will be sand load applied on high-speed train(SLAHT) caused by sand particles hitting train surface. This will have a great impact on the train stability, running drag and surface corrosion. Numerical simulation method of SLAHT in sand environment is studied. The velocity and mass flow rate models of saltation and suspension sand particles and the calculation model of SLAHT caused by sand particles hitting train surface are established. The discrete phase method is adopted for numerical simulating the process of saltation and suspension sand particles moving to train surface and generating sand load. By comparison with the field tests, the numerical simulation reliability is analysed. The theoretical formula of SLAHT changing with cross-wind and train speed is proposed. SLAHT changing law is analyzed. Research results indicate that SLAHT changing with cross-wind and train speed is a quadratic relationship. When train speed is constant, SLAHT increases quadratically with cross-wind speed improvement. When cross-wind speed is constant, SLAHT increases quadratically with train speed improvement.
文摘为解决城市轨道交通实物沙盘模型维护维修困难、行车调度作业实训项目不足、企业现场教学容纳能力有限、安全风险高等问题,基于行车调度相关岗位职业能力,设计实训项目和工作任务,利用Unity3D建模、Visual studio C#、虚拟现实技术等工具,设计开发集城市轨道交通电子虚拟沙盘、虚拟列车和信号仿真模块、多角色协同实训模块等功能于一体的虚拟仿真教学与实训平台,克服了以往实训设备利用率不高、学生兴趣不足等问题。
