cae技术在半挂运输车轻量化分析中的应用word格式论文.docxVIP

优秀毕业论文 精品参考文献资料 CAE 技术在半挂运输车轻量化研究中的应用 摘 要 随着我国高等级公路网的逐步建成，公路运输逐渐成为我国客货运输的主要形式之 一。由于半挂车具有价格低廉、运输效率高、载重量大以及运费较低等优点，已经成为公 路货运的主要运输工具。传统设计过于保守，产品的质量和刚度过大，这不仅降低了半挂 车的装载量,而且加剧了燃油的消耗，增加了尾气的排放，污染了环境。 对传统半挂车进行轻量化设计，用高强度钢代替原先的普通钢，可以克服其上述种种 缺点。为了保证用高强度钢替代后的半挂车仍然具有良好的性能，首先对车架在不同工况 下进行了线性静力学和非线性动力学分析，得出了车架的强度和刚度，所得强度结果在材 料的许用范围之内，刚度结果也达到了厂方提出的相关的要求。之后对半挂车的后下部防 护进行了非线性动力学分析，得到了???变形量及移动壁障的速度和加速度随时间变化的曲 线，所得结果证明该半挂车的后下部防护达到了国标中的相关要求。 关键词：半挂运输车，车架，甩挂，后下部防护，静力学线性分析，动力学非线性分析 i  PAGE 4  PAGE 3 APPLICATION OF CAE TECHNOLOGY TO LIGHTWEIGHT RESEARCH OF SEMI-TRAILER Abstract Along with Chinas Highway network gradually formed, road transport has become the primary means of passenger and freight transport. the semi-trailer ,which has the advantages of affordable、transport efficiency、load and lower shipping cost, has become the main road freight transport. The traditional design experience is so conservative that the quality and the stiffness of the products is too large, which not only reduces the semi-trailer s loading capacity directly but also increase the fuel consumption and exhaust emissions as well. It will exacerbate the environment pollution. The shortcomings could be overcome by lightweight design that the semi-trailer is made of high-strength steel instead of the original ordinary steel for traditional semi-trailer. In order to ensure with the semi-trailer still have a good performance after the substitution of high-strength steel, Linear static and nonlinear dynamic analysis of the frame has been done at different operating conditions,which draws strength and stiffness of the frame, the results drew by analysis are verified and achieve the requirements of the factory.Nonlinear dynamics analysis for the semi-trailer rear underrun protection is also made,which draws rear underrun protections deformation and the speed and acceleration changes over time curve of the mobile barrier , and the results meet the relevant requirements of the GB. KEY WORDS: semi-trailer,fram