某燃油箱边界约束对应力分析精度的影响研究  

The effect of fuel tank's boundary constraints on the accuracy of FEA stress analysis

作　　者：张婷婷 尹辉俊 刘赟[1] 曹稚英 ZHANG Tingting;YIN Huijun;LIU Yun;CAO Zhiying(School of Mechanical Engineering Guangxi University of Science and Technology,Liuzhou545006,China;Engineering Training Center,Guangxi University of Science and Technology,Liuzhou545006,China)

机构地区：[1]广西科技大学机械工程学院,广西柳州545006 [2]广西科技大学工程训练中心,广西柳州545006

出　　处：《广西科技大学学报》2018年第1期49-54,68,共7页Journal of Guangxi University of Science and Technology

基　　金：广西高等学校优秀人才资助计划项目(桂教人[2011]40号);广西自然科学基金项目(2013GXNSFAA019319);广西科技计划项目(桂科攻1348005-12);广西重点实验室建设项目(桂财教[2013]51号13-A-01-06);广西研究生教育创新计划项目(YCSW2017202);广西科技大学研究生教育创新计划项目(GKYC201703)资助

摘　　要：针对某乘用车燃油箱的振动耐久性试验要求,需满足约束边界不导致局部不合理应力和快速建模等条件,建立较高精度的仿真分析模型,预测可能产生结构失效的区域.采用有限元软件Hypermesh为分析工具,在燃油箱箱体连接孔处,分别建立了全约束连接和只约束3个平动自由度的约束连接,通过静态和瞬态响应分析油箱结构的应力较大区域.试验结果表明,产生的结构失效区域与只约束3个平动自由度约束连接的仿真分析结果相符,切实反应了燃油箱的薄弱区域,为后续产品结构优化及虚拟测试提供可靠的建模基础.To meet the requirements of passenger car fuel tank’s vibration durability tests,we build a precise model to predict possible structural failure area,which meets the requirements that the constraint boundary does not lead to improper local stress and that model building is fast.By using the finite element software Hypermes has the analysis tool,we establish fuel tank body connection holes model separately by full degrees constraints and3translational degrees constraints.By static analysis and transient response analysis,we predict structure dangerous areas.The simulation results show that the restrained3translational dofs connections coincide with the weak region of the fuel tank.It provides a reliable basis for fuel tank’s optimization and virtual test.

关 键 词：燃油箱 边界约束 瞬态分析 应力分析精度 

分 类 号：U464.136[机械工程—车辆工程]