摘要
对铁路车轮运行过程中非圆化问题进行分析和非圆化形式进行定义分类。建立一个新的真实模拟车轮椭圆化的数学模型,结合车辆/轨道空间耦合动力学模型,分析计算出高速车轮椭圆化引起的车辆轮对横向动力响应,确定了车速200 km/h轮对椭圆度对蛇行运动影响范围。数值结果分析表明,高速车轮椭圆化将导致车辆系统横向蛇行失稳,严重恶化其运行品质.并大大降低其横向稳定性。轮对蛇形运动状态和行车速度、轮对左右轮椭圆形状的相位以及椭圆度有密切联系。
The problem on out-of-round railway wheels in their service is analyzed and the wheel out-of roundness is made into categories. A new mathematical model is put forward numerically to simulate the wheel ovalization, which is called the second order periodic non-roundness of wheel. In the numerical simulation, the dynamic model of a half railway vehicle coupled with a tangent track is employed, in which elliptical railway wheels are considered in the calculation of the wheels and the rails in rolling contact. Using the new numerical method investigates the effect of the wheel ovalization on the dynamic behavior of the wheelsets in the lateral direction, and determines the critical range of wheel ovalization at vehicle speed of 200 km/h. The numerical results show that the ovalization of high speed railway wheels has a great influence on the occurring of the vehicle hunting and the lateral stability. The situation of the wheelset hunting caused by the wheel ovalization depends greatly on the combinations of the wheel ovalization extent, the vehicle speed, and the phase angle of the ovalization of the two side wheels of the wheelset. Increasing the wheel ovalization will cause a decrease in its lateral stability.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2008年第3期50-56,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金(50521503)
国家重点基础研究发展计划(973计划，2007CB714702)
铁道部科技研究开发计划(Z2006-049)
西南交通大学牵引力国家重点实验室开放基金(TPL0803)资助项目。
