大型装载机翻车和落物保护结构有限元分析及试验研究

发布时间：2018-01-11 13:45

本文关键词：大型装载机翻车和落物保护结构有限元分析及试验研究　出处：《吉林大学》2011年硕士论文　论文类型：学位论文

【摘要】：翻车和保护装置(ROPS)是安装在工程车辆驾驶室外的一钢架结构系统,其主要功能是当车辆发生滚翻等意外事故时,保障驾驶员的安全,最大限度地降低事故造成的生命财产损失。随着工程车辆出口量的增加及国际上对其安全保护性能要求的提高,进入国际市场的工程车辆必须配备性能合格的ROPS,这就要求国内各个工程车辆生产厂家和科研机构改进和完善工程车辆驾驶室的安全保护结构,并通过相应的安全保护结构试验获取国际性安全认证,为国产工程车辆国际出口铺平道路。本文在此思想的指导下,针对大型轮式装载机ROPS进行了试验和理论的研究,主要内容如下: 1.以弹塑性力学理论为基础,应用有限元分析软件ANSYS建立了大型轮式装载机ROPS和FOPS的非线性有限元模型,基于国际标准ISO 3471《土方机械──翻车保护结构实验室试验和性能要求》及ISO 3164《土方机械──保护结构的实验室鉴定──挠曲极限量的规定》,对其进行了有限元分析。 2.按照上述国际标准对大型轮式装载机的ROPS和FOPS结构进行了实物试验,对其产品是否能达到国际标准规定的性能要求进行了认证;然后将有限元分析结果与试验结果进行对比,比较结果表明所建立有限元分析模型是合理的,ROPS非线性分析结果是比较准确的。通过本文的有限元分析和试验研究获得了大型轮式装载机ROPS的失效机理和设计时应注意的关键问题。
[Abstract]:Roll over and protection device (ROPS) is a steel structure engineering vehicle driving system is installed in the outdoor, its main function is when the vehicle rollover accidents, ensure the safety of the driver, to minimize accidents caused by the loss of life and property. With the increase of exports and international engineering vehicles on the safety protection performance requirements for the improvement of engineering vehicles to enter the international market must be equipped with qualified ROPS performance, safety protection structure which requires all domestic vehicle manufacturers and research institutions to improve and perfect the construction vehicle cab, and access to international safety certification through the corresponding security structure test, paving the way for the domestic international engineering vehicle exports. In this paper, under the guidance of this idea, in view of the large wheel loader ROPS test
The main contents of the study and theory are as follows:
1. the elastic-plastic mechanics theory, nonlinear finite element model using finite element analysis software ANSYS to establish a large wheel loader ROPS and FOPS, the international standard ISO 3471< - earthmoving machinery ROPS laboratory tests and performance requirements of 3164< and ISO > > stipulates: earthmoving machinery protection structure laboratory identification -- deflection limiting volume based on the finite element analysis was carried out.
2. in accordance with the international standard of large loader ROPS and FOPS structure of physical experiment, performance of the product can reach the international standard requirements for certification; then comparing the results of finite element analysis, comparison results show that the established finite element analysis model is reasonable, nonlinear analysis ROPS the result is more accurate. Attention should be paid to the failure mechanism and design of the key issues of this paper through the finite element analysis and experimental study of large wheeled loader for ROPS.

【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH243

【引证文献】