汽车油气悬架不对称阻尼特性研究

Study on asymmetric damping characteristics of automotive hydro-pneumatic suspension

针对油气悬架不对称阻尼对车辆减振性能的影响,以某农用运输汽车为研究对象进行了建模、试验和优化研究。首先,建立整车Recurdyn多体动力学模型和油气悬架AMESim模型的联合仿真模型;其次,通过油气悬架试验和仿真结果对比,修正油气悬架AMESim模型中的重要参数;然后,利用油气悬架复原和压缩行程的有效阻尼孔截面积比来表征不对称阻尼,分析其对车辆减振性能的影响;最后,在近似模型处理的基础上,使用Isight软件对复原和压缩行程的有效阻尼孔截面积比进行组合优化。结果表明,重要参数修正后的油气悬架AMESim模型准确可靠;优化后的油气悬架复原和压缩行程的有效阻尼孔截面积比明显提高了车辆减振性能。

For the effect of asymmetric damping of hydro-pneumatic suspension on the damping performance of a vehicle,a gricultural carriage car was modeled,tested and optimized.Firstly,a vehicle model with Recurdyn dynamics and hydro-pneumatic suspension AMESim was developed and jointly simulated.Secondly,the important parameters in the AMESim model were corrected by comparing the hydro-pneumatic suspension test and simulation results.Then the effect on the damping performance of the vehicle was analyzed according to the ratio of the damping hole cross-sectional area of the recovery and compression strokes of the characterization parameter of the hydro-pneumatic suspension asymmetric damping.Finally,based on the approximate model processing,the ratio of effective cross-sectional areas of damping hole of the recovery and compression strokes were combined and optimized using Isight software.The results show that the AMESim hydro-pneumatic suspension model with important parameters corrected is accurate and reliable;the damping performance of the vehicle is significantly improved by the optimized effective cross-sectional areas of damping hole of the recovery and compression stroke of the hydro-pneumatic suspension.