文档介绍：特种车辆整车建模与动力学仿真摘要二}J一世纪激烈的市场竞争要求汽车工业在更短的丁}=发周期中,推出高质量、低价格的产品。汽车产品开发和开发技术的创新,成为汽车工业在市场竞争中求发展的关键环节。在计算机技术迅猛发展的形势下,车辆虚拟开发技术得到了快速发展。本文以多刚体系统动力学的理论方法为基础,以某特种车辆为研究对象,利用机械系统动力学仿真分析软件ADAMS/Car建立了该车的虚拟样机模型,并进行了转向系——前悬架系统和整车系统的动力学仿真。本文在CAD模型的基础上得到了各子系统的关键点坐标,在ADAMS/Car中建立了包括前桥、中/后桥、转向系等子系统的整车多体动力学模型,并利用 AutoFlex/Leafspring建立了钢板弹簧的柔性体模型。通过转向系——前悬架的仿真分析,验证了钢板弹簧的刚度,得到了特种车辆前轮定位参数随车轮跳动行程的变化规律和特种车辆的转向特性参数,并对仿真结果做了一定分析。通过虚拟样机方向盘角阶跃输入试验得到特种车辆具有较好的操纵稳定性,通过平顺性随机输入虚拟试验,得到特种车辆的平顺性一般。整个研究工作以汽车产品的虚拟设计、虚拟分析为核心,对于减少产品开发过程中物理样机的制造成本和工作量,缩短开发时间具有现实意义。[关键词]虚拟样机技术,多刚体系统动力学,操纵稳定性,行驶平顺性、ADAMS 特种车辆整年建模与动力学仿真 Abstract The petition requests theautomobile industry tospend much lesstime develop CarSofhighquality andlow innovation e thelinchpin upon which ess or therapid development puter technology,people had made greatprogress inthewhole vehicle virtual prototype technology Inthisthesis,based on the classictheory ofmulti—body system dynamics,a vehicle virtualprototype isestablished under theADAMS/Car——Ithe mostadvanced mechanical system virtualprototype simulationsystem to carry outvirtualexperiments includes controlstableperformance fort. Using thehardpoim which ismeasured fromthe CAD model,multi—rigid—body dynamics model ofthe whole vehicle isbulided by ADAMS/ model includ some subsystem such assteering、front spension ,toimprove uracy of virtualmodel,ADAMS/Leafsping models thefrontleafspring asmodel—flex—body. Using thesteering一-suspensionassembly tomake some frontsuspension simulation andgetmany character parameters ofsteering and suspension such ascamberangle, toeangle andsteringangle offront wheel,At last,weget thetransient stateandsteady stateresponseparameters ofthecontrol stableperformance andtheparameters fort. The whole research work concentrates Oil theexploration andapplication of isofgreatsignificance toreduce themanufacture time andthe costofreal prototyping. 【keywords】virtual protot