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This is one of the applications of Part (I), in which the angular stiffness, and the corresponding stress distributions of U-shaped bellows were discussed. The bellows
was divided into protruding sections, concave sections and ring plates for the calculation that the general solution (I) with its reduced form to ring plates were used respectively, but the continuity of the surface stresses and the meridian
rotations at each joint of the sections were entirely satisfied. The resent results were compared with those of the slender
ring shell solution proposed earlier by the authors, the standards of the Expansion Joint Manufacturers Association (EJMA),
the experiment and the finite element method. It is shown that the governing equation and the general solution (I) are very effective.
Contributed by HUANG Qian
Biography: ZHU Wei-ping (1962-) 相似文献
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XU Yan-cong GENG Feng-jie 《高校应用数学学报(英文版)》2014,29(1):108-118
In this paper, the complicated dynamics is studied near a double homoclinic loops with bellows configuration for general systems. For the non-twisted multiple homoclinics, the existence of periodic orbit with the specified route and the existence of shift-invariant curve sequences defined on the cross sections of multiple homoclinics corresponding to any specified one-side infinite sequences are given. In addition, the existence regions are also located. 相似文献
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IntroductionBellows[1,2 ]isashellofrevolutionwithwrinkledmeridian ,usuallynamedafteritsmeridionalshapeinaperiodoritsprofileofaconvolution ,suchasΩ_shapedbellows,C_shapedbellows,U_shapedbellowsandsoon .Theyarewidelyusedinmanyfields,forexample ,theelasticsense… 相似文献
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丁协平 《应用数学和力学(英文版)》1984,5(4):1529-1542
In this paper, first we show several new random fixed point theorems for random set-valued mappings and for a system of random set-valued mappings. Then, some applications of our results are given for the existence and uniqueness of random solution for a system of nonlinear random integral and differential equations. Our theorems improved and generalize many recent findings in [4–7, 9, 11–17]. 相似文献
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U型波纹管及相关结构环向屈曲的有限元分析(Ⅲ)--波纹管平面失稳的机理 总被引:1,自引:0,他引:1
波纹管无论是在内压还是在外压作用下都会发生环向屈曲或平面失稳,问题很复杂至今未得到妥善解决。本文首先指出了现行的有关“塑性铰”概念的某些不足之处,然后按文[8]的有限元法(考虑了屈曲前的弯曲和屈曲时载荷的转动并按线性化特征值问题处理)对波纹管的环向屈曲进行了计算,并与前人的有关实验进行了对比分析,在此基础上解释了波纹管平面失稳的原因和发展过程。 相似文献
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IntroductionBellows,ashellofwrinkledmeridianofrevolution ,hasbeingincreasinglyusedinmodernequipmentasanelastic_sensitiveelementandaflexiblejoint.Theformerisusuallysubjectedtolargedisplacementsatitsends,andthelattermaypartlyenterintoplasticstate .Hence ,b… 相似文献
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IntroductionTheequationsandthesolutionproceduresofthefinite_element_displacement_perturbationmethod (FEDPM)forthegeometricnonlinearbehaviorsofshellsofrevolutionsubjectedtopurebendingmomentsorlateralforcesinoneoftheirmeridionalplaneswerepresentedin (Ⅰ ) .… 相似文献
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利用(Ⅰ)提出的旋转壳在子午面内整体弯曲的几何非线性摄动有限元法分析了波纹管在纯弯矩、横向力作用下的刚度和应力分布。首先,将其中的一阶摄动解(线性解)和作者曾经提出的中细环壳一般解、初参数积分解进行了比较,以及与他人的实验、有限元分析进行了比较,表明本法具有良好的精度和可靠性,且如(Ⅰ)所指出的那样,波纹管子午线曲率的突变不妨碍一般直线单元的应用。然后,讨论了波纹管的非线性特征,结果显示,波纹管的非线性效应主要来自其环板,而且环板愈宽非线性效应愈大,例如,C型波纹管相当于环板宽度为零的U型波纹管,因而其非线性效应几乎可以忽略不计。此外,在纯弯矩作用下,依线性解波纹管各个波的应力分布是相同的,而依非线解各个波的应力分布是不相同的,但对于常见的波纹管,在工程精度内线性解是有效的。 相似文献
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IntroductionC_shapedbellowsorreferredtoassemi_circlebellowsarewithcomplexconfiguration(Fig .1) .Attheconcaveandconvexjointsoftheshell,forexampleatpointC ,thelatitudeangleψincreasesby 180°abruptly .Soitisthekeytocalculationforbellowsthatmakingupsolutionsexact… 相似文献