汽车工程专业毕业设计(论文)-

东北大学再教育学院毕业论文I摘要随着汽车的普及，交通事故也日趋频繁，人们对汽车安全性的要求也越来越高。对于这些要求，只有通过对汽车系统动力学的深入研究才能实现。在多体系统动力学分析软件中，ADAMS是车辆动力学中应用最广，最为著名的一个软件。本文基于多刚体动力学ADAMS软件对汽车制动系统参数进行优化设计。在ADAMS/Car模块中构建整车动力学模型，进行直线制动仿真，分析了影响制动性能的关键因素；基于响应面法利用ADAMS/Insight模块对制动系统前、后制动轮缸活塞面积,前、后制动器的摩擦系数和前后制动管路压强分配系数进行优化，得到制动距离最短的制动系统优化参数；并对优化前后的制动性能进行对比分析。结果表明：经过优化后的汽车制动性能得到较大改善。关键词：盘式制动器；仿真；响应面法；参数优化东北大学再教育学院毕业论文IIAbstractWiththepopularizationofautomobile,Trafficaccidentbecomesmoreandmore.Morepowerfultechnologyandmethodsmeetthem,andtheyallbasedonbetterlystudingsystemdynamicsofautomobile.ThesoftwareADAMS,whichdevelopedwithmulti-bodysystemdynamics,isthemostfashionableandauthoritativesoftwareinthefieldofmechanicaldynamicssimulation.Optimizationdesignforautomotivebrakesystemparametersisdiscussedinthispaperbasedonmulti-bodydynamicsoftwareADAMS.InADAMS/Carmodule,thevehicledynamicmodelisbuiltandstraightbrakesimulationisperformed,theoptimalrangesofmainfactorsaredeterminedafteranalyzingthefactorseffectingbrakeperformance.ByusingresponsesurfacemethodologyagroupofoptimalparametersisobtainedwithshortestbrakedistanceinADAMS/Insightmodule.Theresultsofsimulationarecomparedwiththatoftheprimaryisenhancedafteroptimaldesign.Keywords:discbrake;simulation;responsesurfacemethodology;parameteroptimization东北大学再教育学院毕业论文III目录摘要.......................................................................................................................................IAbstract...............................................................................................................................II1绪论..................................................................................................................................11.1本课题来源及意义.................................................................................................11.2国内外研究现状及发展趋势.................................................................................11.3本课题研究的主要内容.........................................................................................32制动系的主要参数及选择...............................................................................................42.1制动力与制动力分配系数.....................................................................................42.2同步附着系数.........................................................................................................72.3制动器最大制动力矩.............................................................................................93ADAMS软件简介.......................................................................................................113.1ADAMS软件概述..............................................................................................113.2ADAMS软件基本模块......................................................................................133.2.1用户界面模块(ADAMS/View).................................................................133.2.2求解器模块(ADAMS/Solver).................................................................143.2.3后处理模块(ADAMS/PostProcessor).....................................................153.2.4轿车模块(ADAMS/Car)...........................................................................164基于ADAMS的汽车建模................................................................................................174.1主要系统模型.......................................................................................................174.1.1前悬架系统.................................................................................................174.1.2后悬架系统.................................................................................................184.1.3转向系统.....................................................................................................194.1.4制动系统.....................................................................................................194.2整车模型的建立...................................................................................................204.3原车直线制动仿真...............................................................................................214.3.1仿真标准.....................................................................................................214.3.2仿真条件.....................................................................................................224.3.3仿真方法.....................................................................................................22东北大学再教育学院毕业论文IV5制动系统参数优化设计.................................................................................................245.1优化目标和设计参数...........................................................................................245.2优化方法与结果...................................................................................................255.2.1创建设计矩阵...........................................................................................255.2.2更改设计因素...........................................................................................265.2.3提出并更改响应.......................................................................................285.2.4运行试验.............