中文摘要：

基于非线性因素对滚珠丝杠式惯容器实际力学性能的影响机理分析，建立了考虑摩擦以及丝杠弹性效应的惯容器非线性力学模型，进行了惯容器实际力学性能试验，根据试验数据对惯容器非线性力学模型中的参数进行了识别。在此基础上，建芷了包含惯容器非线性的两级串联式惯容器一弹簧一阻尼器（ISD）悬架半车5自由度数学模型，通过对悬架参数的灵敏度分析，确定了ISD悬架参数的优化变量。根据车辆行驶平顺性性能评价指标，建立了ISD悬架参数优化模型，并采用粒子群优化算法对两级串联式ISD悬架的参数进行了优化。结果表明，该优化方法在满足车辆行驶安全性和控制悬架撞击限位概率的要求下，座椅处垂向加权加速度均方根降低了24．12％，车辆行驶平顺性得到了显著改善。

英文摘要：

Based on the impact of nonlinear factors on the actual mechanical properties of inerter, a nonlinear mechanical model with friction and elastic effect of screw was built. The mechanical property testing of inerter was carried out and the parameters of inerter nonlinear mechanical model were identified through the test data. Then, the mathematical model of two-stage series-connected ISD suspension with five degrees of freedom and nonlinear inertcr was huih. The optimized variables were determined through the sensitivity analysis of ISD suspension parameters. According to the performance evaluation index of ride comfort, the parameter optimization mathematic model of ISD suspension was established and the parameters were optimized by particle swarm optimization （PSO） algorithm. The optimization results indicated that under the premise the optimization met the requirements of driving safety and suspension working space, and th（e root mean square value of weighted seat vertical acceleration went down by 24. 12%. It was concluded that the method proposed could effectively improve the vehicle ride comfort.