汽车平顺性仿真分析论文.doc

xxxxxx毕业论文 题 目 汽车平顺性仿真分析 学生姓名 xxxxx 学号 xxxxxxxx 所在学院 xxxxxxxx 专业班级 xxxxxxxx 指导教师 xxxxxx __ ____ 完成地点 xxxxxxxxx 2015年 4 月 28 日 汽车平顺性仿真分析 xxx （xxx机械工程学院xxxxx班级xx xx xxx） 指导教师：xxx [摘要]本文介绍了汽车平顺性的发展概况和评价方法，在众多的平顺性研究方法中采用了传统的数学建模研究方法，建立了汽车整车9自由度汽车模型，并应用 MATLAB软件，对模型进行了赋值仿真。参考国内外大量文献，对汽车平顺性的发展及研究方法进行了论述，并对MATLAB软件做了基本介绍，针对汽车平顺性仿真的关键问题：路面激励建模、振动模型建模和仿真方法进行了综述和分析。根据1/2汽车模型建立9自由度动力学模型，模型中包括了驾驶室、发动机、人体座椅，能够方便对平顺性进行评价。然后利用牛顿第二定律建立9自由动力学模型的微分方程，为方便以后计算求出刚度矩阵、阻尼矩阵、输入刚度矩阵并将微分方程用矩阵的形式表示。 [关键词] 9自由度；平顺性；Matlab仿真 Vehicle Ride Simulation Analysis Xxx （Gradexxx,Class1,Major Energy and power engineering，Mechanical Engineering Dept.，xxx University of Technology，xxxxxx，xxxx） tutor: xxxx Abstract：This article describes the ride overview of the development and evaluation methods cars, ride in many studies using the traditional method of mathematical modeling methods, the establishment of a car model automobile 9 degrees of freedom, and MATLAB software, the model the assignment simulation. Reference to a number of domestic and foreign literature, the car ride development and research methods are discussed, and MATLAB software to do the basic introduction to the key issues for the car ride simulation: the road excitation modeling, vibration modeling and simulation methods the review and analysis. Established by a car model 9 1/2 DOF dynamic model includes a cab, engine, body seat, to facilitate the evaluation of ride comfort. Then use Newtons second law establishing differential equations 9 free dynamic model for the future to facilitate the calculation determined stiffness matrix, damping matrix and stiffness matrix input and differential equations in matrix form. Key words：9 degrees of freedom ; comfort; matlab/simulink xxxx毕业论文 PAGE PAGE I 目 录 TOC \o 1-3 \h \z \u 11