加肋双曲冷却塔的非线性稳定分析<sup>*</sup>

李龙元; 卢文达

加肋双曲冷却塔的非线性稳定分析^*

上海市应用数学和力学研究所

基金项目: * 国家自然科学基金资助项目;上海市科委下达的研究项目

计量
- 文章访问数: 1782
- HTML全文浏览量: 98
- PDF下载量: 538
- 被引次数: 0
出版历程
- 收稿日期: 1987-12-12
- 刊出日期: 1989-02-15

Nonlinear Buckling Analysis of Hyperbolic Cooling Tower Shell with Ring Stiffeners

Shanghai Institute of Appl. Math, and Mech., Shanghai

摘要

摘要: 本文采用有限元数值分析方法对土木工程中的大型钢筋混凝土双曲冷却塔壳的非线性稳定问题作了具体的数值计算.文中为了讨论双曲塔壳在屈曲后的特性,采用了将普通的载荷增量迭代法与改进的R.C.弧长法相结合的混合算法.为了与实际工程相符合,文中除了将钢筋混凝土当作非均匀体以外,还考虑了塔自重、底部的离散支承、及环向加肋等因素的影响.

Abstract: This paper is concerned with a numerical solution of hyperbolic cooling tower shell, a class of full nonlinear problems in solid mechanics of considerable interest in engineering applications. In this analysis, the post-buckling analysis of cooling tower shell with discrete fixed support and under the action of wind loads and dead load is studied. The influences of ring-stiffener on instability load are also discussed. In addition, a new solution procedure for nonlinear problems which is the combination of load increment iteration with modified R-C are-length method is suggested. Finally, some conclusions having important significance for practice engineering are given.

HTML全文

参考文献(16)

[1]	Mang,H.A.,et al.,Finite element instability analysis of hyperbolic cooling towers,Advances in Civil Engineering Through Engineering Mechanics,New York,ASCE.(1977),246-249.
[2]	Chan,A.S.L.,et al.,Cooling tower supporting columns and reinforced rings in small and large displacement analysis,Comput.Meth.Appl.Mech.Engrg.,13(1978),1-26.
[3]	Abel,J.F.,et al.,Buckling of cooling towers,J.Struet.,Div.,ASCE,108(1982),2162-2174.
[4]	Abel,J.F.,et al.,Comparison of complete and simplified elastic buckling loads for cooling tower shells,IASS-RUB(1984),309-318.
[5]	Mungan,I.,et al.,Nonlinear behaviour of cooling tower shells,IASS-RUB(1984),298-307.
[6]	Mang,H.A.,et al.,Physically linear buckling analysis of reinforced concrete cooling towers-Design necessity or academic excercise?,IASS-RUB(1984),279-297.
[7]	Dulacska,E.,Buckling of reinforced concrete cooling tower shells,IASS-RUB(1984),239-252.
[8]	卢文达、李龙元,非均匀弹性双曲冷却塔的动力计算,上海力学,2 (1987), 43-52
[9]	Brebbia,C.A.,Finite Element Systems.A handbook,A Comput.Mechanics Centre Publication(1982).
[10]	Thomas,G.R.,et al.,A triangular element based on generalized potential energy concepts,Finite Elements for Thin Shells and Curved Members,Chapter 9,Edited by D.G.Ashwell and R.H.Gallagher,Wiley(1976).
[11]	Dhatt.D.G.,An efficient triangular shell element,AIAA,J.,18(1970).
[12]	Dovey,H.H.,Extension of three-dimensional analysis to shell structures using the finite element idealization,Ph.D.Dissertation,Univ.of California,Berkeley,UC-SESM Report No.74-2,Jan.(1974).
[13]	Bergan,P.G.,et al.,Solution techniques for nonlinear finite element problems.Int.J.for Numerical Methods in Engrg.,12(1978),1677-1696.
[14]	Crisfield,M.A.,A fast incremental/iterative solution procedure that handles snap-through.Comput.and Struct.,13(1983),55-62.
[15]	Ahmad,S.,et al.,Analysis of thick and thin shell structures by curved finite elements,Int.J.for Numerical Methods in Engrg.,2(1970).
[16]	Sabir,and Lock,The application of finite elements to the large deflection geometrically nonlinear behaviour of cylindrical shells,Variational Methods in Engineering,ed.C.A.Brebbia and H.Tottenham,Southampton Univ.Press(1973),7-67.