ABSTRACT

Friction coupling independently rotating wheelsets have advantages of both rigid wheelsets and independently rotating wheelsets. These wheelsets have self-steering ability on straight lines and large curves. They can also reduce the wear of wheels. The analytical relationship between the friction torque and the lateral displacement of wheelsets was deduced in this study based on motion characteristics of the ideal constraints, including a single wheelset and a friction coupling bogie. Further, the method involving the friction coupling torque with the goal of lateral displacement was presented, and the linear and nonlinear dynamic verification models were established. A linear relationship was found between the friction torque and the lateral displacement of a single wheelset through theoretical analysis and simulation model. When passing a large curve, the front and rear wheelsets in a friction coupling bogie had three states: slip-slip, slip-stick and stick-stick. The proposed method determined the friction torque and accurately controlled the lateral displacement of wheelsets. The dynamic performance of friction coupling bogies was between the performance of a rigid wheelset and that of independently rotating wheelsets, thus effectively relieving the wear of wheel flange.

摘要

摩擦耦合独立旋转轮对兼具刚性轮对和独立旋转轮对的优点。这些轮对在直线和大曲线上具有自转向能力。它们还可以减少车轮的磨损。本研究基于单轮对和摩擦耦合转向架等理想约束的运动特性，推导了轮对摩擦力矩与横向位移的解析关系。进一步提出了以横向位移为目标的摩擦耦合力矩方法，建立了线性和非线性动态验证模型。通过理论分析和仿真模型，发现摩擦力矩与单轮对横向位移之间存在线性关系。在通过大弯道时，摩擦耦合转向架的前后轮对有打滑、打滑、打滑三种状态。该方法确定了摩擦力矩并精确控制了轮对的横向位移。摩擦耦合转向架的动态性能介于刚性轮对和独立旋转轮对之间，有效缓解了轮缘磨损。