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本文是从连续介质复合材料层合壳理论,用有限元法对变厚度、正交各向异性的纤维缠绕回转壳进行应力分析的。采用的是截锥壳单元,通过假定位移场建立单元刚度,用直接刚皮法首先求出各节圆的位移,然后求出各节圆的内力、内力矩、应变、曲率变化、应力合力和应力合力矩这种方法也可直接用于变厚度、各向同性任意形状回转壳的应力分析,程序可以通用。从几个例子的实际计算结果来看,这种分析方法可以达到较高的精度。
In this paper, the stress analysis of variable thickness, orthotropic fiber-wound revolving shells is carried out using the finite element method from the theory of laminated composite shells. The truncated conical shell element is used. By assuming the displacement field to establish the stiffness of the element, the displacement of each pitch circle is first obtained by the direct skinning method, and then the internal force, internal moment, strain, curvature change, and resultant stress are obtained for each pitch circle. The method of combining stress and moment can also be directly used to analyze the stress of a revolving shell of variable thickness and isotropic shape. The program can be used universally. From the actual calculation results of several examples, this analysis method can achieve higher accuracy.