汽车悬置系统传递函数高效测试研究方法 毕业设计.docVIP

密级： NANCHANG UNIVERSITY 学 士 学 位 论 文 THESIS OF BACHELOR （2008 —2012年） 题 目 汽车悬置系统传递函数高效测试的研究方法 学 院： 机电工程学院 系 动力工程 汽车悬置系统传递函数高效测试的研究方法 专 业：车辆工程 学 号：5902408039 学生姓名：吴和兴 指导教师：罗明军 摘要 随着经济的发展，生活水平的提高，汽车也越来越普及化，人们对汽车的舒适性的要求也越来越高。汽车振动、噪声及因其而引发的车辆乘坐舒适性问题，即NVH（Noise, Vibration Harshness）问题，是衡量汽车产品质量的一个综合性问题。而汽车的舒服性与汽车的隔振能力有着直接的关系。汽车的隔振能力取决于悬置系统以及车架与车身连接点性能的好坏。 本文主要研究发动机的振动经悬置系统传递到车架，再由车架经与车身连接点传递到车身的一个大致传递效率。 利用上海东昊的数据采集仪器DH5902以及DHDAS5902_NET动态信号分析系统软件配合使用得到数据和图像，从而进行数据分析和处理，然后分析了悬置系统以及车身和车架连接点的传递率、传递函数。然后再使用MATLAB软件作进一步的分析。最终可得出两级传递和一级一级传递的一个关系。 关键字：软件分析；悬置系统；车架与车身连接点；传递率The vehicle mounting system a method of transfer function efficient testing Profession: Vehicle Engineering Student ID: 5902408039 Student Name: Wu Hexing Instructor: Luo Mingjun Abstract Along with economic development, improvement of living standards, the vehicle is the growing popularity, too. The cars comfort requirements are getting higher and higher for people. Vehicle vibration, noise, and caused by because of its vehicle ride comfort, that is NVH (Noise, Vibration Harshness), is a comprehensive problem measure of the quality of automotive products. The comfortable of car and Isolation ability of the car has a direct relationship. The vibration isolation of automotive depends on the mounting system as well as frame and body connection point good or bad of performance. This paper mainly studies the vibration of the engine through mounting system pass to the frame, then by the frame with the body connection point pass to the body a general transfer efficiency. By used Shanghai Donghao data acquisition equipment DH5902 and DHDAS5902_NET dynamic signal analysis system to Obtain data and images, so it can be data analysis and processing, and then we analyze the suspension system as well as the body and the connection point of the frame tran