考虑物性变化的油气悬架两相流力学特性研究  

Research on Two-phase Flow Mechanics Properties of Hydro-pneumatic Suspensions Considering Physical Property Varieties

作　　者：邓佩瑶 谷正气[1,2] 张沙[1] 马骁骙 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [2]湖南文理学院洞庭湖生态经济区建设与发展省级协同创新中心,常德415000

出　　处：《中国机械工程》2017年第17期2043-2048,2055,共7页China Mechanical Engineering

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA041805);中央财政支持地方高校专项资金项目(0420036017);湖南大学汽车车身先进设计与制造国家重点实验室自主课题资助项目(734215002)

摘　　要：为精确研究油气悬架力学特性,考虑了油气不分离式油气悬架工作过程中,由高压工作环境导致的气体溶解与油液密度等物理特性变化对其力学特性的影响。通过用户自定义函数,一方面在VOF两相流模型中添加质量源项,另一方面对油液密度变化进行动态定义,建立了考虑油气悬架物理特性变化的精确两相流模型,分析了油气悬架力学特性。进行了整车随机道路试验,在试验过程中对油气悬架上下支点加速度信号进行监测,基于试验数据,在ADAMS中建立了悬架虚拟试验台,以验证所建精确两相流模型的精确性,结果表明精确模型的仿真精度相较于未考虑物理特性变化的原始VOF模型的仿真精度提高了10%。In order to study the mechanics properties of a hydro-pneumatic suspension accurately,the influences of the gas dissolving and the density variety of oil on the mechanics properties of hydropneumatic due to the high pressure was taken into account.Using the UDF,on the one side,the mass source was added to the model of volume of fluid（VOF）,and on the other side,the variety of the density of oil was defined with the varieties of pressures,then a hydro-pneumatic two-phase flow accurate model was established to analyze the mechanics properties of the hydro-pneumatic suspensions.And the vehicle random road experiments were conducted.The acceleration signals of the hydro-pneumatic suspension＇s fulcrums up and down were monitored.Based on the experimental data,the hydropneumatic suspension virtual experimental platform was established to verified the accuracy of the accurate two-phase flow model.The results show that the accuracy of the accurate model is improved by10% compare to the original one.

关 键 词：油气悬架 用户自定义函数 气体溶解 油液密度 虚拟试验台 

分 类 号：O359.1[理学—流体力学]