文档介绍：华中科技大学硕士学位论文
摘要
随着汽车技术的发展,节能、环保、安全、舒适、智能和网络是汽车技术发展的总趋势,减小汽车自身质囊是汽车降低燃油消耗及减少排放的有效措施之一。减小汽车自身质量、提高燃油效率是今后汽车技术发展的主要方向之一。
随着计算机技术的发展,计算机分析仿真和模拟技术越来越多地应用到汽车设计中,CAE极大地缩短了产品的研制周期,减少了开发费用,有利于通过优化等手段开发出性能更为优越的汽车整车和零部件。采用有限法(FEM)计算车身结构的应力和变形,进行强度和刚度分析,应用到新车型的车身结构分析中,以便使其在满足车身强度和刚度的目标要求下,达到车身的轻量化设计。
本文基于有限元分析方法研究客车车身轻量化设计问题,建立了车身结构有限元模型,总结归纳了客车车身结构离散化的方法,在各种工况下通过对车身应力和变形计算分析研究,并进行了客车车身结构的模态分析和车身局部结构的灵敏度分析,探索车身结构对车身总成的强度和刚度的影响,优化车身结构,达到车身轻量化设计,将结果应用到车身结构设计中,使车身结构设计有据可查、有理可依,达到精确的动态设计来替代经验静态设计,以降低车身钢材的浪费,减轻车身重量,
降低成本,提高整车的燃油经济性。
关键词:客车车身骨架有限元结构分析轻量化
华中科技大学硕士学位论文
Abstract
With the development of automobile technology,energy-conservation,environmental protection,fortable,intelligence and interact Rre the total trends of the automobile technical is to reduce one’s own weight of the car that reduces the fuel consuming and harmful gas lightweight of the automobile c匝 improve the economy of the fuel is one of the main directions of the automobile technical development in the future to reduce one’s own quality of the car and to knpmve the efficiency of the fuel.
With the development of technology of puter,puter analyses, emulation and simulation technology are applied to the automobile design more and more.
CAE has shortened the research cycle of the products greatly,reduced the development to develop pleted car with more superior performance and spare part throu曲the meal-is of finite element method(FEM)puter the stress and deforming of the automobile body structure is carried on in intensity and
rigidity results ate applied to the new style in the automobile body structure analysis,in order to make it reach the automobile body lightweight under the condition of meeting the intensity and goal request for rigidity of automobile body.
The lightweight of bus body and designs were studied based on the finite clement
finite element model of automobile body Was set discrete me