《基于ANSYS的客车车身结构分析及其轻量化设计》

基于ANsys软件平台的汽车CAE分析技术,主要分析车身机构及其轻量化在结构设计上的应用

2006年用户年会论文

基于ANSYS的客车车身结构分析及其轻量化设计

[李靖谊 张关良 尹明德 张中元]

[南京航空航天大学，南京210016]

[ 摘 要 ] 在尝试NJ6826TMF型客车车身的数字化设计中，根据其几何、物理、材料特性，运用ANSYS

对车身强度和刚度、固有频率振型和路谱进行了分析，并提出使该车身轻量化的设计方案。模

型的简化原则是，略去功能件和非承载的工艺结构，对于大圆弧和过渡圆弧，以曲面分块和曲

线分段的思想进行适当的以直代曲；模型反映对象的主要力学特性；强度、刚度、动态分析采

用壳元，轻量化设计用梁元。这样，既能保留整车结构的主要特征，又能提高数值模拟的解算

效率；所有计算结论由企业采纳或供其参考，为它实现客车的数字化设计与制造打下了基础。

[ 关键词 ] 客车车身，ANSYS，强度分析，动态分析，轻量化

Structure Analysis and Lightweight Design for Bus Bodies

With ANSYS

[Li Jingyi Zhang Guanliang Yin Mingde Zhang Zhongyuan]

[Nanjing University of Aeronautics and Astronautics, Nanjing 210016]

[ Abstract ] The digital design for the type of passenger bus NJ6826TMF is attempted with ANSYS,

which consists of analyses of strength, stiffness, mode, and spectrum of road surfaces

according to geometry, physics, and material of its body framework. Based on analysis

results, the static and dynamic character of the body is evaluated, the suggestion of

improving the body is made, and body lightweight is proposed in order to try to resolve the

overweight. The simplified principle for a 3D modeling of the body is that function parts and

non-load-carrying framework of arts and crafts is geometrically omitted, and large or fillet

arcs are reasonably divided into curve segments which are replaced by straight lines

according to the division idea of sculpture curves and surfaces; the modeling possess the

main mechanical character of the framework; the shell is used in analyses of strength,

stiffness, and dynamic; the beam in lightweight design. Application of the principle make not

only the main structure character remain, but also the calculation efficiency of numerical

simulation improve. All results in the paper are adopted or consulted by the enterprise; the

foundation for digital design and manufacturing of its NJ6826TMF is built.

[ Keyword ] Bus Bodies, ANSYS, Strength Analysis, Dynamic Analysis, Lightweight