A级乘用车悬置系统匹配设计

发布时间：2019-02-16 12:37

【摘要】：现阶段我国汽车产销量高速增长,尤其是A级乘用车成为了人们大量使用的代步交通工具。同时,人们也越来越关注它的乘坐舒适性。动力总成悬置系统作为整车关键的减振子系统,如何减少振动传递,从而减少对乘员乘坐舒适性的影响一直是悬置系统匹配设计的关键。悬置系统的优良匹配关系到整车的NVH性能,甚至能够影响消费者的购买意愿。经过良好匹配的动力总成悬置系统,不但能够有效地降低振动和噪声,还能够很好的保护动力总成,从而提高整车的可靠性品质。所以,悬置系统的匹配研究具有重要的意义。本文的主要研究内容如下:(1)从介绍悬置系统的隔振原理及目前国内外研究现状开始,提出悬置系统匹配研究具有重要意义。开展悬置系统力学模型分析,作为理论分析的基础。介绍悬置系统匹配所需要的不同参数及参数获取方式,阐述悬置系统惯性参数3D和实物不同方式的参数获取方法。通过ADAMS三维动力学模型的初步验证,分析出本文车型悬置系统优化前存在的不足。(2)通过对悬置系统的布置理论分析引出系统匹配设计时常用的能量解耦方法,进行悬置系统刚度曲线设定介绍,制定出本文A级乘用车悬置系统开发的运动控制目标和模态解耦目标。通过仿真继续优化得到最优状态的悬置刚度,并进行悬置刚度曲线的设计,使常规工况能起到较好的隔振效果,极限工况能够控制动力总成的位移等要求。(3)通过悬置系统台架试验和实车试验进行分析评价,实验结果与仿真分析结果接近,满足开发目标要求。同时,提出了适用于A级乘用车悬置系统的主观评价及评分方法。通过进行实车台架试验、整车隔振试验,得出客观分析数据,在客观试验的同时,开展了实车的主观评价,从主客观角度验证了整套开发匹配流程的合理性。
[Abstract]:At present, automobile production and sales are increasing rapidly in our country, especially class A passenger car has become a popular transportation vehicle. At the same time, people also pay more and more attention to its ride comfort. As the key damping subsystem of the whole vehicle, how to reduce the vibration transmission and reduce the influence on the ride comfort of the occupant is the key to the matching design of the mount system. The excellent matching of the mount system is related to the NVH performance of the whole vehicle, and can even affect the consumer's purchase intention. After a well-matched powertrain mount system, not only the vibration and noise can be effectively reduced, but also the power assembly can be protected well, thus improving the reliability and quality of the whole vehicle. Therefore, it is of great significance to study the matching of mount system. The main contents of this paper are as follows: (1) starting from the introduction of the isolation principle of the mount system and the current research situation at home and abroad, it is of great significance to study the matching of the mount system. The mechanical model analysis of mount system is carried out as the basis of theoretical analysis. This paper introduces the different parameters and the methods of obtaining the parameters needed for the matching of the mount system, and expounds the methods of obtaining the parameters of the mounting system in different ways, which are 3D of inertia parameters and different ways of the physical objects. Through the preliminary verification of ADAMS three-dimensional dynamic model, the shortcomings before optimization of vehicle mount system are analyzed. (2) the energy decoupling method commonly used in the system matching design is derived by analyzing the layout theory of the mounting system. The stiffness curve of the mounting system is introduced, and the motion control target and modal decoupling target of the A class passenger vehicle mounting system are worked out in this paper. The optimal mounting stiffness is obtained by simulation, and the mounting stiffness curve is designed to make the vibration isolation effect better under normal working conditions. The limit working conditions can control the displacement of the power assembly. (3) the test results are close to the simulation results and meet the requirements of the development goal. (3) through the test of mounting system and the actual vehicle test, the experimental results are close to the results of simulation analysis. At the same time, a subjective evaluation and scoring method for A-class passenger car mounting system is proposed. Through the actual vehicle bench test, the whole vehicle vibration isolation test, obtains the objective analysis data, in the objective test simultaneously, carried out the actual vehicle subjective evaluation, from the subjective and objective angle has verified the entire development matching flow rationality.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U464.13

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