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1、本文格式为Word版，下载可任意编辑发动机连杆有限元分析 发动机连杆的有限元分析 摘 要 连杆作为发动机结构中一个重要构件，其作用是将活塞的往复直线运动变成曲轴的旋转运动，并在活塞和曲轴之间传递作用力。连杆在工作中经受拉伸、压缩和弯曲等交变载荷的作用。一个重量轻而且具有足够强度的连杆对现代发动机设计起到举足轻重的作用 。 本文参考了 CA4110 柴油机的相关参数，对四缸柴油机的连杆进行了结构设计和力学分析。应用Pro/E 软件进行建模，以 ANSYS Workbench 软件为平台，对连杆模型进行有限元分析。为了能更好地保证精度，使边界条件和载荷与工程实际状况相符合，并考虑了各种受力状况，进
2、行了静力学分析、模态分和谐响应分析。 静力学分析表明连杆最大应力值小于材料屈服强度极限，即符合强度要求。动态的模态分析，不仅从静态上保证了连杆的强度，同时也了解了连杆的动态的振动特性。连杆在不同固有频率下振型不同，在第四阶振型时易失效，并且在发动机工作时应当尽量避开各阶的固有频率。谐响应分析表明，结构在2400Hz 的响应最猛烈，可导致弯曲失稳的位移最大。 关键词 : 发动机连杆；有限元分析；模态分析；谐响应分析 欢迎下载 Finite element analysis of engine connecting rod Abstract Connecting rod as an importa
3、nt component in the engine structure, its function is to the reciprocating linear motion of the piston into the rotation of the crank movement, and between the piston and the crankshaft transfer reaction. Connecting rod subjected to tensile, compression and bending in the job, etc. The effect of cyc
4、lic loading. A light weight and has enough strength of the connecting rod to the modern engine design play a decisive role. This article through to CA4110 reference for the related parameters of the diesel engine, four cylinder diesel engine connecting rod for the structure design and mechanics anal
5、ysis. Pro/E software modeling is applied in this article, based on ANSYS Workbench software platform, finite element analysis was carried out on the model. In order to better guarantee the accuracy, the boundary conditions and load and engineering to coincide with the actual situation, and consider
6、the various stress distribution, the static analysis, modal points harmony response analysis. Statics analysis shows that the strength of the connecting rod maximum stress is less than the yield limit, which conform to the requirements of the strength. From the static and dynamic modal analysis, not
7、 only ensure the strength of connecting rod, as well as understand the dynamic vibration characteristic of the connecting rod. Connecting rod under different natural frequency vibration mode is different, prone to failure when the fourth order vibration mode, and should be avoided when engine workin
8、g each order natural frequency. Harmonic response analysis shows that the response of the structure in 2400 Hz is the most severe, can lead to the unstability of the bending displacement is the largest. Key words ： ： The engine connecting rod;The finite element analysis; The modal analysis; Harmonic
9、 response analysis 欢迎下载 目 录 第 1 章 绪论 . - 1 - 1.1 课题来源及讨论的目的和意义 . - 1 - 1.2 国内外讨论现状及分析 . - 2 - 1.3 主要讨论的内容 . - 3 - 第 2 章 连杆的三维建模 . - 4 - 2.1 连杆的结构及参数分析 . - 4 - 2.1.1 连杆的结构类型 . - 4 - 2.1.2 连杆结构参数及其分析 . - 4 - 2.2 基于 Pro/E 连杆的建模 . - 5 - 2.2.1 Pro/E 的简介 . - 5 - 2.2.2 连杆的建模过程 . - 6 - 第 3 章 连杆的静力学分析 . - 10
10、 - 3.1 连杆材料的选择 . - 10 - 3.2 连杆的有限元网格划分 . - 10 - 3.3 连杆的运动和受力分析 . - 11 - 3.4 约束与载荷 . - 12 - 3.5 静态模拟结果分析 . - 13 - 3.5.1 连杆总变形分析 . - 13 - 3.5.2 连杆等效应力分析 . - 14 - 3.5.3 连杆等效应变分析 . - 14 - 3.6 静态分析结论 . - 15 - 第 4 章 连杆的模态分析 . - 16 - 4.1 模态分析理论 . - 16 - 4.2 约束与载荷 . - 17 - 4.3 连杆模态求解与分析 . - 17 - 4.4 连杆模态分析结论 . - 19 - 第 5 章 连杆的谐响应分析 . - 20 - 5.1 谐响应分析 . - 20 - 5.2 谐响应分析的结论： . - 21 - 欢迎下载 结论与展望 . - 22 - 结论 . - 22 - 展望 . - 22 - 第 1 页
