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中文摘要：
作为与不同焊接不规则通过一个磁道的车辆，磁道部件的动态性能被使用 a coupled 车辆鈥搕r ack 模型详细调查。在模型，车辆与自由的 35 个学位作为一个多身体系统被建模，并且一根 Timoshenko 横梁被用来为被睡眠者分离地支持的栏杆建模。在课程模型，睡眠者为他们的垂直、侧面、滚动的运动作为僵硬身体财务被建模并且假定以经常的速度向后移动模仿以一样的速度沿着课程跑的车辆。在联合车辆和课程动力学的学习， Hertizian 接触理论和理论由沈鈥揌e drick 鈥揈l 建议分别地，家族被用来计算正常并且爬在车轮和栏杆之间的力量。在正常力量的计算，正常接触僵硬的系数被车轮和栏杆表面的短暂接触状况决定。在蠕动的计算，侧面，栏杆的连接运动和在在他们的普通正常方向的车轮和栏杆之间的相对速度等于零的事实同时被考虑。车辆和磁道的运动方程借助于一个明确的集成方法，栏杆焊接不规则作为垂直偏差由一些理想的余弦函数描述了的本地轨道在被建模被解决。不规则的火车速度，轴负担，波长和深度的效果，和在一个睡眠者的焊接中心位置在装载的车轮鈥搑a il 影响上跨越被分析。获得的数字结果是极大地在引起由的焊接栏杆侧面不规则的忍耐设计有用在栏杆焊接和轨道维护以后磨手。关键词栏杆焊接 - 不规则 - 车辆鈥搕r ack 联合动力学这个工程被中国(2007CB714702 ) 和中国(50821063， 50675183 和 50875221 ) 的国家自然科学基础的国家基本研究节目支持。
英文摘要：
As a vehicle passing through a track with different weld irregularities, the dynamic performance of track com- ponents is investigated in detail by using a coupled vehi- cle-track model. In the model, the vehicle is modeled as a multi-body system with 35 degrees of freedom, and a Timoshenko beam is used to model the rails which are dis- cretely supported by sleepers. In the track model, the sleepers are modeled as rigid bodies accounting for their vertical, lat- eral and rolling motions and assumed to move backward at a constant speed to simulate the vehicle running along the track at the same speed. In the study of the coupled vehicle and track dynamics, the Hertizian contact theory and the theory proposed by Shen-Hedrick-Elkins are, respectively, used to calculate normal and creep forces between the wheel and the rails. In the calculation of the normal forces, the coefficient of the normal contact stiffness is determined by transient contact condition of the wheel and rail surface. In the calcu- lation of the creepages, the lateral, roll-over motions of the rail and the fact that the relative velocity between the wheel and rail in their common normal direction is equal to zero are simultaneously taken into account. The motion equations of the vehicle and track are solved by means of an explicit integration method, in which the rail weld irregularities are modeled as local track vertical deviations described by some ideal cosine functions. The effects of the train speed, the axle load, the wavelength and depth of the irregularities, and the weld center position in a sleeper span on the wheel-rail impact loading are analyzed. The numerical results obtained are greatly useful in the tolerance design of welded rail pro- file irregularity caused by hand-grinding after rail welding and track maintenances.
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