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In this paper, applying perturbution method to yon Krmn nonlinear large deflection equations of plates by taking deflection as perturbation parameter, the pa(?)buckloing behavior of simply supporied rectungular plates under umaxial compression is (?)igated. Two types of in-plane boundary conditions are now considered and the efferis of initial imperfections are also studied. It is found that the theoretical results are in good agreement with experiments. The method suggested in this paper whieh has not been found in previons papers is rather simple and easy for the postbuckling analysis of rectangular plates. 相似文献
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In this paper, applving perturbation method to von Kármán nonlinear large deflection equations of plates by taking deflection
as perturbation parameter, the posibuckling behavior of simply supported rectangular plates under uniaxial compresion is investigated.
Two types of in-plane boundary conditions are now considered and the effects of initial imperfections are also studied. It
is found that the theoretical results are in good agreement with experiments.
The method suggested in this paper which has not been found in previous papers is rather simple and easy for the postbuckling
analysis of rectangular plates. 相似文献
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我们用固相反应法合成了LaBa2Cu3-xZnxOy(0≤x≤1.0)系列样品.X-光衍射分析显示,在整个掺杂区内皆为正交结构,晶格常数a,b和c随掺杂量的增加略有增大.Zn含量的增加使体系正常态的电阻率上升.红外光谱(IR)表明:对于不掺杂的样品,在531cm-1和583cm-1附近有两个显著的吸收峰,随掺杂量x的增加前者基本不移动,后者则向高频移动,强度略有减小.电子顺磁共振实验(EPR)揭示了Zn掺杂对Cu2 的自旋关联行为的影响.本文讨论了掺杂对结构、输运性质和自旋关联的影响. 相似文献
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轮胎结构分析的一般壳体精化理论 总被引:2,自引:0,他引:2
基于一般壳体理论和Reddy型剪切精化理论,发展出适用于充气轮胎的结构非线性分析的一般壳体精化理论。为获得一个具有解析结构的近似解,将Bezier多项式用于分片描述轮胎几何形状和位移场,应用Rayleigh-Ritz法构造轮胎在充气内压作用下的内力,变形和层间应力的解,这一模型具有任意铺层性,复杂曲面逼近便捷和求解精度可控等优点。为比较起见,文中还对轮胎结构作了三维有限元数值分析。两种方法的综合比较表明,该文提出的轮胎模型不仅预测结果精确,而且大大节省计算量。 相似文献
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