摘要
为解决列车纵向缩比模型试验中轮轨摩擦力载荷难以精确缩比的问题,基于列车纵向多体耦合碰撞模型,以国内某8编组动车组为例,研究轮轨摩擦系数对碰撞过程中能量耗散的影响规律。研究表明,列车碰撞过程中的能量耗散主要集中在头部碰撞界面,且轮轨摩擦系数对列车碰撞过程中响应规律的影响是不容忽略的。采用最小二乘法构建头部碰撞界面最大压缩量(D)关于运行车辆轮轨摩擦系数(μ_1)、静止车辆轮轨摩擦系数(μ_2)的三阶响应曲面,实现不同摩擦系数间的相互转化,并同列车1/8比例模型碰撞试验结果进行比较。结果表明:响应面模型的拟合结果与试验结果吻合较好,相对误差为8.86%,说明响应面模型是可靠的。
In order to solve the problem that friction is hard to scale accurately in the scaled train model test in longitudinal direction.Based on the model of coupled multi-body collision in longitudinal direction,a 8-car sets EMMs（Electric Multiple Units）was used to study the effects of the friction coefficient on energy dissipation during the collision,and some revise methods were taken.The study shows that the train collision energy dissipation mainly in head-on collision interface,and the effects of the coefficient of friction cannot be ignored.To achieve mutual conversion between different friction coefficients,a third-order response surface between head-on collision interface maximum compression value（D）and coefficient of friction of motion car（μ_1）、coefficient of friction of still car（μ_2）was built using the least squares method,and compared with a 1/8 scaled train model tests.The results indicate that response surface model accords well with the test,and their difference is 8.86%,which shows that the response surface model is reliable.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2018年第3期51-57,共7页
Journal of the China Railway Society
基金
国家科技支撑计划(2015BAG12B01-22)
关键词
缩比试验
多体耦合模型
摩擦系数
尺寸效应
scaled test
coupled multi-body model
coefficient of friction
size effect
