单轴式单轨转向架空气悬架参数优化

对单轴转向架的结构以及空气悬架进行分析,建立了单轴式单轨车辆系统的动力学拓扑结构,并运用动力学软件SIMPACK建立动力学仿真模型。通过ModeFRONTIER软件的灵敏度分析功能,对单轴转向架空气悬架参数进行筛选,得到对导向力矩和走行轮侧偏合力这2个优化目标影响显著的空气悬架参数,分别为空气弹簧的纵向刚度、纵向阻尼和垂向阻尼。利用改进型遗传算法对这3个参数进行多目标优化。优化后的导向力矩较优化前减小了4.76%,走行轮侧偏合较优化前减小了7.57%,改善了车辆的曲线通过性能。

Optimization of Air Suspension Parameters for the Single-axle Monorail Bogie

With an analysis of the single-axle bogie structure and air suspension,the dynamic topological structure of monorail vehicle system is established,and the dynamic software SIMPACK is used to build a dynamic simulation model.Then,with the sensitivity analysis of ModeFRONTIER software,the parameters of the single-axle bogie air suspension are screened.Thus,the parameters that have significant influence on the oriented torque and the corning force of running wheel are obtained,they are the longitudinal stiffness,longitudinal damping and vertical damping of the air suspension respectively.An improved genetic algorithm is used to implement multiple-target optimization for the above three parameters.The oriented toque after improvement is reduced by 4.76%and the corning force of running wheel by 7.57%,resulting in better vehicle curve passing performance.