论文部分内容阅读
通过理论计算与现场试验研究高速列车与板式轨道的动力相互作用。提出了高速列车—板式轨道系统(简称此系统)空间振动分析方法:列车模型每节车辆考虑26个自由度;针对板式轨道结构特点,建立了32个自由度的板式轨道空间振动轨段单元新模型;基于弹性系统动力学总势能不变值原理及形成系统矩阵的“对号入座”法则,建立了此系统空间振动矩阵方程;采用Wilson-θ法求解。计算了板式轨道在高速列车作用下的位移以及车辆的脱轨系数、轮重减载率、横向轮轨力等动力响应,并与现场试验结果进行了对比。结果表明:理论计算结果与现场试验结果具有较好的一致性,由此说明文中提出的方法正确可靠。最后,还探讨了轨道刚度对此系统空间振动响应的影响规律。
Study on the Dynamic Interaction of High-speed Trains and Slab Tracks by Theoretical Computation and Field Experiments. A method of spatial vibration analysis of high-speed train-slab track system (referred to as this system) is proposed: 26 degrees of freedom are considered for each train model of the train model; 32 slab free space vibration orbit elements are established according to the characteristics of slab track structure Model. Based on the principle of invariable value of total potential energy of elastic system dynamics and the “condemnation” rule that forms the system matrix, the equation of the system vibration matrix is established. The Wilson-θ method is used to solve the model. The displacement of the slab track under the action of high-speed train, the derailment coefficient of the vehicle, the wheel load reduction rate, the lateral wheel-rail force and other dynamic responses were calculated and compared with the field test results. The results show that the theoretical calculation results are in good agreement with the field test results, and the method proposed in this paper is correct and reliable. Finally, the influence of track stiffness on the spatial vibration response of the system is also discussed.