EQ1090货车车架有限元分析及结构优化.doc

湖 北 汽 车 工 业 学 院 毕 业 论 文 PAGE PAGE 6 摘要 本文运用Hyperworks有限元分析工具进行四种极限工况（弯曲工况、扭转工况、紧急制动工况和紧急转弯工况）下的静态强度分析。通过Hyperworks软件对车架设计空间进行二维及三维拓扑优化设计，将车架后半部应力易集中部位设计成一个实体，用Optistruct模块进行强度分析。最后，对车架的整体进行参数化建模，以最大位移和最大应力为约束条件，以车架总体积为设计目标，提取车架几何模型，并对模型进行二次设计，得到最优化的车架横梁结构及尺寸，降低了车架的重量，节约了原材料。本文利用拓扑优化这种概念性设计方法得到满足各种工况指标的车架应力分布，并通过抽象模型建立实体、拓扑优化得出最佳车架框架。为车架的设计提提供了良好的基础理论和依据，并为车架的优化设计提供了新的思路和可行路线，对厂家的生产实践具有指导意义。 关键词：Hyperworks；静力分析；结构设计；有限元分析；拓扑优化；二次设计  　　　 Abstract In this paper, the finite element analysis tools Hyperworks four kinds of extreme conditions (bending conditions, reversing the working conditions, working conditions and emergency braking cornering conditions) under static strength analysis. By Hyperworks space frame design software for 2D and 3D topology optimization design, easy to stress the latter part of the frame parts designed as a centralized entity, with Optistruct strength analysis module. Finally, the frame of the whole parametric modeling, to the maximum displacement and stress constraints, to a total volume of the frame designed to extract frame geometry model, and the model for the second design, the most optimal frame beams structure and size, reducing the weight of the frame, saving material. In this paper, topology optimization method of this conceptual design to meet various working conditions indicators frame stress distribution, and through the establishment of an abstract model of the entity, topology optimization framework that the best frame. The design for the frame to mention the theory provides a good foundation and basis for the optimal design of the frame provides a new way of thinking and feasible route, the manufacturers of production practice of guiding significance. Keywords: Hyperworks; static analysis; structural design; finite element analysis; topology optimization; quadratic optimization  目录 TOC \o 1-3 \h \z \u 26304 摘要 1 7970 Abstract 1 31492 目录 2 3515 1 绪论 5 10417 1.1 课题背景 5 19433 1.2 货车车架研究的目的和意义 5 32