柔性轮对的轮轨接触参数分析  

Analysis on Wheel-Rail Contact Parameters of Elastic Wheelset

作　　者：张宝安[1] 陆正刚[1] 王恒亮[1] 

机构地区：[1]同济大学铁道与城市轨道交通研究院,上海201804

出　　处：《同济大学学报（自然科学版）》2013年第4期577-582,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(51175381)

摘　　要：只考虑轮对弯曲振动下的结构柔性,建立了把车轴考虑成铁木辛科梁的柔性轮对简化模型,用格林函数求解其在稳态谐波力作用下的运动方程,从而求出车轮倾斜角位移.根据轮轨接触几何约束关系,用解析方法推导了柔性轮对与钢轨接触几何的约束方程组,对该约束方程组进行求解,得到轮轨接触几何参数,并与相应的刚性轮对轮轨接触参数进行了对比,讨论了轮对弯曲变形对轮轨接触点位置及其接触参数的影响.结果表明,当轮对横移量超过5mm时,轮对的结构柔性会导致轮轨接触参数发生明显变化;该简化模型可以有效地解决需要考虑轮对柔性的轮轨接触计算问题.The structural flexibility of wheelset due to bonding vibration was taken into account. A simplified model of elastic wheelset was established with the axle being considered as a Timoshenko beam, and the inclined angular displacement of wheel was derived from solving its equations of motion in the steady-state harmonic force via Green＇s Function. According to the geometric constraint relationship of wheel-rail contact, the constrained equations of elastic wheelset-rail contact geometry were analytically derived. The geometric parameters of wheel-rail contact were calculated by solving those equations. Comparisons of wheel-rail contact parameters between the elastic wheelset and the rigid wheelset were carried out, and discussions about the influence of wheelset＇s bonding deformation on wheel-rail contact locations and contact parameters were held, respectively. Results show that when the wheelset lateral displacement exceeds 5mm, the wheel-rail contact parameters change significantly due to wheelset structural flexibility; the simplified model is beneficial to wheel-rail contact calculation issues for elastic wheelset.

关 键 词：柔性轮对 轮轨接触参数 铁木辛科梁 格林函数 

分 类 号：U271.91[机械工程—车辆工程]