中文摘要：

针对车辆行驶平顺性优化问题,提出基于虚拟激励法的灵敏度分析方法。车辆采用三维有限元模型,路面不平顺视为平稳高斯随机过程。通过对运动方程的微分处理,用虚拟激励代替外激励项,可以高效、精确地得到设计变量的一阶、二阶灵敏度信息;再结合适当的灵敏度优化方法,达到提高车辆平顺性的目的。算例数值结果表明文中方法的正确性和高效性。

英文摘要：

Sensitivity analysis formulae for optimizing the ride comfort of vehicle suspension systems are derived using the pseudo excitation method(PEM).A spatial finite element model is used to describe the dynamic behavior of a vehicle running on a randomly uneven road,of which the irregularity is assumed to be a Gaussian random process.Based on the random equations of motion with the right-hand side random acceleration replaced by a pseudo acceleration excitation,various first and second orders of sensitivity for...