虚拟环境下客车空气悬架的动力学仿真分析研究.pdf

武汉理I:大学硕十学位论文摘要随着空气悬架在汽车上的推广使用,汽车的操纵稳定性和行驶平顺性得到了很大的提高。为了提高汽车自主开发能力、缩短汽车开发周期、降低开发成本,本文以某客车为平台,对其空气悬架进行仿真研究。通过对整车动力学模型操纵稳定性和行驶平顺性的仿真分析和计分评价来验证空气悬架的使用有利于提高客车的行驶性能。本文首先提出了课题的研究内容和意义,详细介绍了空气悬架的结构类型及其弹性元件的特性。然后对客车空气悬架系统做了匹配研究,并详尽地分析了空气悬架系统对汽车操纵稳定性和行驶平顺性的影响。其次,利用ADAMS/Car模块建立前扭杆弹簧独立悬架、后空气悬架、转向系统、车身、轮胎系统和路面系统的整车仿真多体动力学模型,并对各部件之间的运动和联接做了深刻的分析。最后,在整车多体动力学模型的基础上根据汽车操纵稳定性试验方法、汽车平顺性脉冲输入行驶试验方法和汽车平顺性随机输入行驶试验方法的要求, 设置实验参数和环境,对所建整车模型进行了稳态回转试验、转向盘角阶跃试验、转向盘角脉冲试验、蛇形试验、平顺性脉冲输入试验和平顺性随机输入试验的仿真分析;并根据汽车操纵稳定性指标限制和评价方法对试验结果进行了计分评价,验证了空气悬架的使用有利于提高客车的操纵稳定性和行驶平顺性。关键词:客车,空气悬架,虚拟样机,操纵稳定性,行驶平顺性武汉理一J:人学硕十学位论文 Abstract With the use ofthe airspring inthe vehicle,controllability and stability of vehicle and automobile fort have been order toimprove theautomobile self-development capacity,shorten the vehicle development cycle, reduce development costs,air spring system ofbus hasbeen studied inthispaper. Advantage with use of airspring hasbeen validated though simulation and analysis andevaluation points of thewhole vehicle. Firstly,this paper explains the content and significance ofthesubject,and introduces airspring suspension system and characteristics the matching study ofvehicle suspension system has been made,and influence upon controllability and stability of vehicle and automobile fort has been explained particularly. Secondly,multi-body dynamics model ofthe whole vehicle,including front torsionbarspring independent suspension,rear airsuspension,steering system,body, tiresand theroadsystem,have been setup invirtualprototyping environment,and made adeepanalysis about themovement andconnection between ponents. Finally,on thisbasis ofthewhole vehicledynamics model ofthewhole vehicle, thispaper setupexperimental parameter and environment by controllability and stability testprocedure ofautomobile and automobile ride testprocedure,and made simulation test,including steady ircular test,steering wheel anglestep test, steering wheel angle pulse test,pylon course tes