首页|钢轨砂带磨削温度场建模与仿真

钢轨砂带磨削温度场建模与仿真

扫码查看
结合钢轨与砂带的接触几何关系,建立接触区域磨削深度和轮廓计算模型,阐明磨削工艺参数对接触区参数的影响规律.随着砂带磨削半径的增加,不同钢轨廓形处接触区域面积呈对数增加,接触区域轴长半径位置也在不同截面上变化.结合钢轨砂带磨削过程特性,求解接触区域热流密度计算模型并进行理论验证.基于接触区域磨削深度和轮廓计算模型,以及区域热流密度计算模型,应用瞬时点热源温度场、连续作用点热源温度场、连续作用移动点热源温度场对接触区域连续作用移动面热源温度场进行离散化求解.研究结果表明,在设定磨削工艺参数下,钢轨磨削表面的仿真和理论温度的变化趋势相似,且几乎在同一时间达到温度最大值,最高温度的仿真和理论计算的相对误差为6.14%,验证了本文理论模型和仿真的正确性.
Modeling and Simulation of Temperature Field in Rail Belt Grinding
Based on the geometric relationship between the steel rail and the abrasive belt,a calculation model for the grinding depth and profile of the contact area is established to clarify the influence of grinding process parameters on the contact area parameters.As the grinding radius of the abrasive belt increases,the contact area of different steel rail profiles increases logarithmically,and the position of the axis length radius of the contact area changes on different cross-sections.Based on the characteristics of the rail abrasive belt grinding process,a calculation model for heat flux density in the contact area was solved and theoretically verified.Based on the contact area grinding depth and profile calculation,and regional heat flux density calculation model solved above,the instantaneous point heat source temperature field,continuous point heat source temperature field,and continuous action moving point heat source temperature field were applied to discretize the temperature field of the continuous action moving surface heat source in the contact area.Research shows that under the set grinding process parameters,the simulation and theoretical temperature changes on the surface of rail grinding are similar and almost reach the maximum temperature at the same time.The relative error between the simulation and theoretical maximum temperature is 6.14%,which verifies the correctness of the above theoretical model and simulation.

grinding machiningtemperature distributiongrinding processheat flux density

高贵敏、刘月明、杨策、赵超越

展开 >

北京交通大学 机械与电子控制工程学院,北京 100044

磨削加工 温度分布 磨削过程 热流密度

国家自然科学基金资助项目

52275399

2024

湖南大学学报(自然科学版)
湖南大学

湖南大学学报(自然科学版)

CSTPCD北大核心
影响因子:0.651
ISSN:1674-2974
年,卷(期):2024.51(4)
  • 19