Optimal Design of Layered Cylindrical Shells with Minimum Weight Under Impulse Loading

2021 IEEE 2nd KhPI Week on Advanced Technology (KhPIWeek) Pub Date : 2021-09-13 DOI:10.1109/KhPIWeek53812.2021.9569982

N. Smetankina, A. Merkulova, O. Postnyi, D. Merkulov, S. Misura

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引用次数: 2

Abstract

The problem of minimizing the mass of layered orthotropic constant-thickness non-closed shells at impulse loading is solved. The shell behavior is described within the framework of the improved theory. According to the extension method, the complex-shape shell can practically be extended to an auxiliary layered cylindrical non-closed simply supported rectangular-shape shell with the same composition of layers. An auxiliary shell is a body whose contour shape and boundary conditions yield a simple analytical solution. In this case, the auxiliary shell is a simply supported non-closed cylindrical layered one with a rectangular plan-view shape, making it possible to find the problem solution as a trigonometric series. To meet the specified boundary conditions, we apply compensating loads to the auxiliary shell. The adaptive optimization method with hybrid elements is applied to solving the problem of optimal shell design. The effect of the geometrical parameters on the optimum design of a two-layer composite shell is investigated. In addition, extremums corresponding to optimum shells and plates are found.

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冲击载荷下层状圆柱壳的最小自重优化设计

解决了层状正交各向异性等厚非封闭壳在冲击载荷作用下的质量最小化问题。在改进的理论框架内描述了壳的行为。根据可拓方法，该复形壳实际上可以扩展为具有相同层数的辅助层状圆柱非封闭简支矩形壳。辅助壳是其轮廓形状和边界条件产生简单解析解的物体。在这种情况下，辅助壳体为简支非封闭圆柱层状壳体，具有矩形平面视图形状，从而可以将问题解作为三角级数求解。为了满足规定的边界条件，我们对辅助壳施加补偿载荷。应用混合单元自适应优化方法求解壳体优化设计问题。研究了几何参数对双层复合材料壳体优化设计的影响。此外，还找到了与最佳壳板相对应的极值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2021 IEEE 2nd KhPI Week on Advanced Technology (KhPIWeek)

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