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1、摘要本文以油田车四种后悬架支架为研究对象，利用PRO/ENGINEER软件建模，在ANSYS-WORKBENCH环境中建立有限元模型。对四种不同后悬架支架的原方案进行工况分析，分析其在不同危险工况下的受力情况，在WORKBENCH模块中进行静态线性分析，根据实际受力情况进行加载，并用不同的网格划分，分析在不同网格单元下，计算结果的差异。并考察在不同危险工况下应力分布及变形情况，最后分析结果是否满足强度要求。将其中一种支架在ANSYS 11.0的经典界面中进行计算分析，将计算结果与在WORKBENCH模块中计算的结果进行对比分析。在分析四种支架在各种危险工况下的原设计方案强度的基础上，尝试提出各
2、种改进方案，改进方案将有效降低其最高应力水平，并用有限元分析验证。本文通过对四种原支架模型的结构和材料进行改进，使其实际最大应力都有了明显的降低。关键词：关键词：有限元，强度，应力，后悬架支架AbstractThis article aims to study the four rear suspension bracket of oil car, using the software of PRO/ENGINEER to set up the model and lestablishing FEM model under ANSYS-WORKBENCH. Firstly, it will a
3、nalyze the original plan of the four different rear suspension bracket and their suffering capability under different dangerous working conditions. Under the module of WORKBENCH, it is going to do a static analysis of linear structures. While stressing according to the actual suffering capability an
4、d dividing with different mesh, it is going to analyze the difference of the result under different mesh cell. Meanwhile, the stress distribution and distortion situation under different dangerous working condition would be examined. Finally, it will analyze whether the result will meet its request
5、for intensity. Put one of the bracket into the classical interfaceANSYS 11.0to analyze and the result is going to be compared with result getting from the calculation under the module of WORKBENCH. Based on the analysis of the original scheme of the four rear suspension bracket under all kinds of da
6、ngerous working conditions, it will try to point out improving schemes accordingly. The improving schemes will reduce its highest stress level effectively and be validated by FEM.According to its improving on the structure of the four original bracket model and its material, this paper, at the same
7、time, has reduced its actual maximum stress obviously.Keyworks：FEM, intensity,stress，rear suspension bracket目录摘要.IAbstract.II1 绪论.11.1 课题来源及简介.11.2 悬架系统的研究现状.11.3 课题研究的内容.32 有限元法基本理论与模型建立.42.1 有限元法的基本思想.42.2 有限元理论解题的主要步骤.52.3 有限元分析在汽车设计中的应用.52.4 有限元空间单元理论简介.72.5 建立实体模型的简介.92.5.1. Pro/ENGINEER 软件简介.92.5.2.四种支架模型的建立.102.6 本章小结.123 四种后悬架支架的原方案的强度分析.133.1 ANSYS 软件简介.133.2 有限元模型的前处理.143.2.1 导入后悬架支架的有限元模型.143.2.2 设置单元属性及材料类型.153.2.3 网格划分.173.3 确定模型的边界条件.173.4 计算结果分析.183.5 四中后悬架支架的工况简介.183.5.1 前支架的工况简介.183.5.2 后支架的工况简介.203.5.3 前、后滑块式支架的工况简介.213.5.4 中间支架的工况简介.
