基于虚拟试验场技术的汽车悬架缓冲块虚拟调校

Virtual Tuning of Automobile Suspension Jounce Bumper Based on VPG

基于虚拟试验场(VPG)技术,搭建整车动力学模型及试验场路面模型,针对某车型开展了车身疲劳耐久仿真,针对仿真中发现的车身耐久风险点多且损伤值大的问题进行分析,发现悬架缓冲块载荷过大是车身损伤偏大的直接原因,基于VPG技术对缓冲块进行了虚拟调校,通过增大缓冲块上跳行程减少了缓冲块处于压缩极限的频次,进而降低了车身疲劳损伤。道路耐久试验验证结果表明,优化方案增强了车身耐久性能,并提升了整车舒适性。

Vehicle dynamic model and proving ground road model were built based on virtual proving ground(VPG)technology,and body fatigue&durability simulation was conducted,then an analysis were conducted to address the issue of multiple risk points and large damage values in the fatigue simulation of a vehicle project.Ultimately,it was found that excessive load on the suspension jounce bumper was the direct cause of large body damage.Based on VPG technology,virtual tuning was carried out on the jounce bumper,reducing the frequency of the jounce bumper under compression limit by increasing the jounce stoke of the bumper,thus reducing fatigue damage.The road durability test verification shows that the optimization scheme improves body durability performance and vehicle ride comfort.