面向运行稳定性的高速轨道车辆悬挂参数多目标稳健优化
Multi-objective robust optimization of suspension parameters for high-speed rail vehicle

引入6σ稳健优化方法，以一系纵向刚度、二系横向阻尼、二系抗蛇形减振器阻尼和车速、载客量及轨道曲线半径为设计参数，以车辆脱轨系数和轮重减载率为优化目标函数，构造悬挂参数多目标6σ稳健优化基本模型，经过迭代优化，获得悬挂参数多目标稳健优化结果。稳健优化后车辆脱轨系数和轮重减载率均有所降低，提高了车辆在多工况条件下的运行稳定性。通过与悬挂参数确定性优化结果进行比较，验证了本文方法的有效性。
Longitudinal stiffness of primary suspension, lateral stiffness of secondary suspension and serpentine shock absorber damping and speed, passenger capacity and railway curve radius were regarded as design parameters, meanwhile, derailment coefficient and rate of wheel load reduction were chosen as the dual optimization objective function. The 6σ robust optimization method was then introduced to construct the basic model of 6σ multi-objective robust optimization for suspension parameters. The multi-objective robust optimization results of suspension parameters were obtained through iterative optimization. After robust optimization, the vehicle derailment coefficient and rate of wheel load reduction were both reduced which improved the running stability of vehicle under multi-running conditions. The effectiveness of the proposed method was verified by comparison with the deterministic optimization results of suspension parameters