【作者】 曾斌；

【导师】 来新民； 陈建贤；

【作者基本信息】 上海交通大学 ， 机械工程， 2007， 硕士

【摘要】 高机动性越野车型的研制和开发将显著提高军队机械化信息化水平和陆战机动能力,目前国内军队还没有装备该类型越野车辆,迫切需要自主研制我国第一个高机动性战术车辆系统,以全面提高军队作战能力。车身悬置系统设计、主减速器密封性能和整车驻坡性能是越野车辆亟待解决的主要技术问题,其中,车身悬置系统参数设置不当,将引起支架断裂、软垫破损等一系列问题,严重影响整车平顺性和可靠性,因此,对该军用越野车进行车身悬置系统的研究具有重要的工程实用价值。基于上述研究背景,在军队十五重点车辆开发项目支持下,本文开展了某军用越野车车身悬置系统的研究。首先分析了车身悬置系统失效形式及受力状况,提出损坏零件的改进措施;对军用越野车车身悬置系统动力学进行了研究,确定了某军用越野车车身系统的布置方案;在此基础上,对悬置系统的结构设计参数进行优选。三万公里可靠性试验和各种路况的道路试验证明:改进后的车身悬置系统能较好满足实际应用要求。本文主要开展的工作和结论如下:1、针对该车型在三万公里可靠性试验过程中悬置系统出现的车身悬置软垫、悬置支架和车身零件的失效问题,开展了悬置系统失效形式的分析研究。结果表明:悬置软垫破损、悬置支架断裂和车身零件开裂是几种常见的失效形式,通过对车身悬置系统参数进行优化可以解决上述失效问题。2、应用隔振基本原理,对车身悬置系统隔振与振源的关系、振动与噪声、振动传递率等进行了分析,建立车身悬置系统的简化动力学模型,确定了前、后悬置位置。应用车身总成重心尽可能落在悬置系统的弹性轴上的基本原则,对该车型车身悬置进行了隔振设计,完成了悬置的方案及结构设计,悬置点载荷分布设计。3、提出军用越野车车身悬置系统的匹配设计原则,确定了20%隔振传递率方案作为实车验证时最优方案。基于改进的悬置系统参数,建立改进型越野车车身有限元模型,完成了白车身、车架和整车结构刚度、应力及振动模态分析。实车三万公里可靠性试验、各种地域性试验和实际应用结果表明:改进后的车身总成可以满足设计要求。更多还原

【Abstract】 Research and development of off-road vehicles with high mobility will be contributed to enhance military mechanical and mobile capability. There have no such type of off-road vehicles in the domestic army at present. It is necessary to develop the first vehicle systems with high mobility in our country for increasing the army militancy. To meet practical demand of off-road vehicles we must solve some technical problems including the design of mounting systems, sealing performance of main reducing gear and slope climbing characteristics of whole vehicle. Some huge impact to the bodywork instances will occur, such as the accessory crazed on bodywork floor system, frame ruptured, cushion destroyed on bodywork counting system, etc. Therefore, research of the mounting system is necessary.Under the support of "the Tenth-Five-Year Plan" army project, the systemic research on the mounting system of off-road vehicles is developed in this thesis. The failure mode and stress status of body mounting system is firstly analyzed. The corresponding modification method is proposed. The whole layout strategy of body mounting system is determined based on kinetic analysis. The optimal structure parameter is achieved using FEA and experimental method. The results show that the improved mounting system could meet the practical requirement. The major conclusion is following: 1. There exist several failure problems of body mounting system during the process of 30000km road test. The analysis result shows that the accessory craze on bodywork floor system, frame rupture and cushion destroyed on bodywork counting system will occur during the test. The optimal structure parameter could be used for solve above mentioned failure problems.2. Based on isolation principle the vibration source, noise and vibration transmissibility of body mounting system is analyzed. The simplified kinetic model of mounting system is developed to determine the precise position of front and rear mount. By applying weight distribution principle the isolation design, layout selection, structure design and load distribution of body mounting system are proposed in this part of thesis.3. The optimal design of body mounting system of off-road vehicles is developed. The 20% vibration transmissibility is selected as the optimal design strategy. By using the improved structure parameter of mounting system, the FEA model of off-road vehicle is used for analyze the structure stiffness, stress and vibration modal of Body-In-White, frame and whole vehicle. The road test results show that the improved mounting system could meet the practical requirement.更多还原