Dome Shape Optimization of Composite Pressure Vessels Based on Rational B-Spline Curve and Genetic Algorithm |
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Authors: | Abbas Vafaeesefat |
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Affiliation: | (1) Mechanical Engineering Department, Imam Hussein University, Tehran, Iran |
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Abstract: | This paper presents an algorithm for shape optimization of composite pressure vessels head. The shape factor which is defined
as the ratio of internal volume to weight of the vessel is used as an objective function. Design constrains consist of the
geometrical limitations, winding conditions, and Tsai-Wu failure criterion. The geometry of dome shape is defined by a B-spline
rational curve. By altering the weights of control points, depth of dome, and winding angle, the dome shape is changed. The
proposed algorithm uses genetic algorithm and finite element analysis to optimize the design parameters. The algorithm is
applied on a CNG pressure vessel and the results show that the proposed algorithm can efficiently define the optimal dome
shape. This algorithm is general and can be used for general shape optimization. |
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