薄壁圆筒局部限制失稳的试验及有限元研究
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摘要
以易拉罐为薄壁圆筒试件,设计并加工了一组局部刚性夹持结构,对局部刚性夹持试件进行外压试验,考察了局部限制约束对薄壁外压圆筒稳定性的影响,同时利用有限元软件ANSYS对结构进行了特征值屈曲分析和几何非线性屈曲分析。试验与有限元计算表明:临时性局部限制约束可以提高外压薄壁筒体的抗失稳能力,并且薄壁圆筒的失稳临界压力和失稳波形数随刚性夹持件宽度的增加而增大。
Cans are taken as thin-walled cylindrical shell specimens subjected to external pressure. A group of local rigid clamping structure is designed and manufactured. An experimental study is carried out to discover the influence of local confined constraint on the stability of thin-wall cylinder under uniform external pressure. The eigenvalue buckling analysis and geometric nonlinear buckling analysis are employed with the aid of ANSYS. The experimental and finite element results indicate that temporary local rigid confined constraint can effectively improve the critical pressure of the thin-wall cylinder subjected to external pressure. Meanwhile,the critical pressure and buckling wave number of the specimen increase gradually with the increase of clamping width.
Cans are taken as thin-walled cylindrical shell specimens subjected to external pressure. A group of local rigid clamping structure is designed and manufactured. An experimental study is carried out to discover the influence of local confined constraint on the stability of thin-wall cylinder under uniform external pressure. The eigenvalue buckling analysis and geometric nonlinear buckling analysis are employed with the aid of ANSYS. The experimental and finite element results indicate that temporary local rigid confined constraint can effectively improve the critical pressure of the thin-wall cylinder subjected to external pressure. Meanwhile,the critical pressure and buckling wave number of the specimen increase gradually with the increase of clamping width.
引文
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[2]张梅,孙占远.低温液体运输车在抽空氦检漏中的问题及改进[J].中国特种设备安全,2009,25(9):41-42.ZHANG M,SUN Z Y.Problem of the cryogenic liquid vehicle dur-ing helium leak detection and corresponding tactics[J].China Special Equipment Safety,2009,25(9):41-42.
[3]刘康林,童长河,黄剑平,等.低温夹套容器内罐氦检漏辅助装置:2012202458151.9[P].2012-12-19.LIU K L,TONG C H,HUANG J P,et al.Auxiliary appliance for helium leak detection of cryogenic vessel with jacket.2012202458151.9[P].2012-12-19.
[4]郭英涛,任文敏.关于限制失稳的研究进展[J].力学进展,2004,34(1):41-52.GUO Y T,REN W M.Some advance in confined buckling[J].Advances in Mechanics,2004,34(1):41-52.
[5]LI Z C.Elastic buckling of cylindrical pipe linings with variable thickness encased in rigid host pipes[J].Thin-walled Structures,2012,51(25):10-19.
[6]VASILIKIS D,KARAMANOS SA.Mechanics of confined thinwalled cylinders subjected to external pressure[J].Applied Mechanics Reviews,2014,66(1):010801.
[7]范钦珊,丁红丽,徐秉业,等.安全壳中钢衬壳热屈曲问题理论与实验研究(Ⅱ)—实验部分[J].力学学报,1991,31(1):84-91.FAN Y S,DING H L,XU Bingye,et al.Theoretical and experimental analysis of thermal buckling problems of liner shells(II)-Experimental part[J].Acta Mechanica Sinica,1999,31(1)1:84-91.
[8]郭英涛,任文敏.圆柱壳限制失稳的实验研究[J].工程力学,2006,23(S1):7-10.GUO Y T,REN W M.Experimental study on confined buckling of cylindrical shells[J].Engineering Mechanics,2006,23(S1):7-10.
[9]冯兴奎,孟祥波,付玉华,等.外壁受刚性约束的外压圆筒的稳定性试验研究[J].压力容器,1987,4(6):18-22.FENG X K,MENG X B,FU Y H,et al.Experimental study on the buckling of external pressurized cylinder subjected to outside rigid constraint[J].Pressure Vessel Technology,1987,4(6):18-22.
[10]YAMAMOTO Y,MATSUBARA N.Buckling of a cylindrical shell restrained by an outer rigid wall[J].Theoretical and Appl Mech,1979,27(6):115-126.
[11]高炳军,唐辉永,苏亮,等.露露易拉罐作为外压圆筒稳定性试验试件的可行性研究[J].河北工业大学成人教育学院学报,2008,23(1):53-56.GAO B J,TANG H Y,SU L,et al.Feasibility analysis ofLulupop can as specimen for experiment of cylinder stability under external pressure[J].Journal of Adult Education School of Hebei University of Technology,2008,23(1):53-56.
[12]周云岗,杨靖华.多塔斜拉-悬吊协作体桥力学性能探讨[J].燕山大学学报,2015,39(1):88-94.ZHOU Y G,YANG J H.Study on mechanics property of multitowers cable-stayed suspension bridges[J].Journal of Yanshan University,2015,39(1):88-94.
[13]肖俊华,段晓森.贝氏体钢组合辙叉的准静态接触有限元分析[J].燕山大学学报,2015,39(2):165-169.XIAO J H,DUAN X S.Finite element analysis on bainite steel crossing under quasi-static contact load[J].Journal of Yanshan University,2015,39(2):165-169.
[14]余伟炜,高炳军.ANSYS在机械与化工设备中的应用[M].2版.北京:中国水利水电出版社,2007:84-97.YU W W,GAO B J.ANSYS application in mechanics and Chemical equipment[M].2nd ed.Beijing:China Water&Power Press,2007:84-97.
[15]刘康林,赵国,朱志彬,等.基于ANSYS的圆柱壳限制失稳研究[J].石油化工设备,2013,42(5):8-11.LIU K L,ZHAO G,ZHU Z B,et al.Study on the confined buckling of a cylindricalshell based on ANSYS[J].Petro-Chemical Equipment,2013,42(5):8-11.