摘要
为优化HXD2型大功率交流传动电力机车的车轮型面,建立该机车的动力学模型,并根据大秦线直线以及800和1 000m半径曲线的线路参数分别设置2种线型。以轮轨磨耗、轮轨最大接触应力和轮轴横向力为目标函数,以4段衔接的不同半径圆弧描述车轮型面与钢轨的接触部分,将两端圆弧的半径以及两中间圆弧的圆心坐标作为设计变量,以满足临界速度、轮轨最大接触应力、横向平稳性、垂向平稳性、车轮疲劳因子、轮轨横向力和脱轨系数的要求为约束条件,建立HXD2型电力机车车轮型面多目标优化模型。采用基于高斯径向基响应面的多目标优化方法求解该模型,得到新的车轮型面。结果表明:新车轮型面可使HXD2型电力机车在800和1 000m半径曲线线路上运行时一位轮对的磨耗指数分别降低19.16%和15.95%,一位轮对外侧的轮轨最大接触应力分别降低28.72%和31.44%,一位轮对的轮轴横向力分别降低22.63%和18.57%。
In order to optimize the wheel profile of high power HXD2 AC drive electric locomotive, the dy- namic model of the locomotive was constructed. Two line types were constructed respectively according to the line parameters of the straight line, 800 m radius and 1 000 m radius curve lines on Datong-Qinhuangd- ao Line. Wheel-rail wear, the maximum wheel-rail contact stress and wheel axle lateral force were chosen as the objective functions. Four connected arcs with different radius were chosen to describe the contact part between wheel profile and rail. The radius of two end arcs and the center coordinate of two arcs in the middle of four arcs were chosen as design variables. With satisfying the requirements of critical speed of vehicle, the maximum wheel-rail contact stress, lateral running smoothness, vertical running smoothness, wheel fatigue factor, wheel-rail lateral force and derailment coefficient as constrains, the multiobjective op- tirnization model for the wheel profile of HXD2 electric locomotive was constructed. Gauss radial basis re- sponse surface based multiobjective optimization method was used to solve the multiobjective optimization model and gain the new wheel profile. The results show that, the new wheel profile can respectively re- duce 19.16% and 15.95% the wear index of the leading wheelset of HXD2 electric locomotive on 800 and 1 000 m radius curve. The wheel-rail contact stress on the outer side of the leading wheelset is reduced 28.72M and 31.44M respectively. The wheel-axle lateral force of the leading wheelset is reduced 22. 63M and 18. 57% respectively.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2013年第1期75-81,共7页
China Railway Science
基金
铁道部科技研究开发计划项目(2009J016)
关键词
电力机车
车轮型面
磨耗
接触应力
轮轴横向力
重载铁路
Electric locomotive
Wheel profile
Wear
Contact stress
Wheel axle lateral force
Heavyhaul railway
