固定辙叉区心轨轨顶降低值优化设计方法

An Optimization Method for Height of Nose Rail at Turnout Crossing

摘要:

为了提升车辆过岔的轮轨动力性能，改善心轨的受力状况，根据辙叉区轮对与心轨和翼轨的接触特征，提出了一种固定辙叉心轨轨顶降低值的优化设计方法，该方法以降低车辆通过固定辙叉区的轮轨接触力为设计目标，以保证车辆的运行安全性和心轨轨顶降低值曲线的单调性为约束条件，利用粒子群算法求解优化模型，具有较快的收敛速度。研究结果表明，该优化设计方法能够根据岔区的钢轨廓形、翼轨加高值以及踏面廓形快速设计出与翼轨匹配较优的心轨轨顶降低值方案，改善辙叉区的轮轨接触关系，从而减小车辆过岔的轮轨冲击。

Abstract:

In order to improve the dynamic wheel-rail interaction of turnout crossing and reduce damage on the nose rail， an optimization method for the height of the nose rail was proposed based on the wheel-rail contact characteristics. This method aims to reduce the wheel-rail contact forces of turnout crossing as the design goal， to ensure the safety of the vehicle and the monotonicity of the longitudinal height of the nose rail as the constraints. The particle swarm algorithm was used to solve the optimization model， which had a faster convergence speed. The results show that the optimization method can quickly design the height of nose rail that better matches the wing rail according to the rail profile of turnout crossing， the heightening value of the wing rail and the tread profile. Moreover， the optimized nose rail can improve the wheel-rail contact relationship， thereby reducing the wheel-rail impact when the vehicle passing the turnout crossing.