半锥角对圆锥形料斗过渡区应力影响的有限元分析  

FEA on infl uence of half-cone angle on stress of transition region of conical hopper

作　　者：邓涛[1] 张国栋[1] 

机构地区：[1]重庆交通大学机电与车辆工程学院,重庆400074

出　　处：《矿山机械》2017年第5期67-72,共6页Mining & Processing Equipment

基　　金：国家自然科学基金资助项目(51305473);中国博士后科学基金资助项目(2014M552317);重庆市博士后研究人员科研项目特别资助(XM2014032)

摘　　要：压力容器筒体和封头的连接处由于结构不连续,易在过渡区域积累较大的应力,而当其应力超过许用应力时,就会产生裂纹,存在一定的安全隐患。以水泥仓为研究对象,利用Solid Works建立简化的容器模型,并用Workbench对其过渡区的应力进行有限元分析,研究其半锥角的变化对过渡区应力的影响。应力随着半锥角的增加而增大,且在半锥角约为35°对具有较小过渡区应力。针对过渡区域的应力集中处提出了加强圈设计,且对不同半锥角的料斗进行有限元分析。结果表明,改进方案对极值应力减小较为明显,最多减小了75.3%;并对水泥仓的安全设计具有一定的参考和指导意义。Due to discontinuous structure of the joint between the shell and the sealing of the pressure vessel, there accumulates considerable large stress in the transition region. While the stress exceeds the allowable value, cracks occurs, which indicates security risk. The cement silo being taken as the study object, SolidWorks was applied to build simplified model of the pressure vessel, Workbench was applied to conduct FEA on the stress of the transition region, and the influence of the half-cone angle on the stress of the transition region was studied. The stress increased with the increase in the half-cone angle, and it was slight as the half-cone angle being about 35°. The reinforcing ring was proposed to add in view of the stress concentration on the transition region, and FEA on the hoppers with various half-cone angles was conducted. The results showed the extreme stress of the improved scheme obviously decreased with the maximum reduction of 75.3%. The proposed improvement scheme was of some reference and guidance for the safe design of the cement silo.

关 键 词：水泥仓 锥形封头 过渡区 半锥角 有限元 

分 类 号：TU311[建筑科学—结构工程]