文档介绍：南京航空航天大学
硕士学位论文
重型汽车车架的结构有限元分析与轻量化设计研究
姓名:赵慧慧
申请学位级别:硕士
专业:车辆工程
指导教师:魏民祥
20071201
南京航空航天大学硕士学位论文
摘要
本文针对潍坊宝利汽车公司设计生产的WFG9280重型车车架结合工程理
论和实际从静态和动态两方面对该重型车车架的力学性能进行了评估并完
成了该车架的结构参数轻量化设计研究内容包括
(1) 采用UG和ANSYS软件建立了该车架基于壳单元的有限元模型分别对
满载弯曲满载扭转紧急制动和紧急转弯四种典型工况下的车架静强度进行
了计算与分析
(2) 开展了该车架的有限元动态分析给出了该车架结构的前十阶固有频率
和模态振型并在车架模态分析的基础上研究了在动载荷作用下的瞬态响应
为重型车车架的动态评估提供了参考
(3) 利用ANSYS的一阶优化方法对车架进行了结构优化设计在保证刚度和
强度的前提下达到了轻量化的目的并利用Visual Basic编程语言和APDL语言
设计了优化软件使车架的优化过程具有了一定的灵活性
(4) 针对该车架进行了相应的电测试验验证了有限元分析模型的正确性及
计算结果的可靠性
本文的研究工作对企业在重型车的设计检验改造和优化等方面具有重
要的参考价值和指导意义
关键词重型车车架有限元分析 ANSYS 静态分析动态分析轻量化
i
重型汽车车架的结构有限元分析与轻量化设计研究
ABSTRACT
With the WFG9280 heavy vehicle frame as subject, the FE(finite element)
analyses were performed to investigate its static and dynamic characteristics, and
further a reasonable project for light-weight design was put forward. In the present
thesis, the following works were mainly carried out.
(1) The 3D FE model of the WFG9280 vehicle frame was built through the
CAD/CAE software of UG and ANSYS, and the static strength analyses were carried
out for the vehicle frame under four work conditions, . bending, torsion, braking
and swerve;
(2) The dynamic characteristics of the vehicle frame were analyzed through the
FE method, and further the first ten vibration modes, as well as the transient response
of the vehicle frame under dynamic load, were given;
(3) The Visual Basic langue and the APDL enclosed in ANSYS were used to
develop a software module for structure optimization design, and further, in order to
reach the aim of light-weight, the vehicle frame was optimized through the module
under stiffness and strength constraints;
(4) The strain tests of the vehicle frame were performed to verify the present FE
results.
The research work in this thesis is very helpful for the improvement of the heavy
vehicle structure design and optimization.
Keywords: heavy vehicle, frame, FEA,