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From:
Cho-Chung Liang (1), Sheau-Wen Shiah (2), Chan-Yung Jen (3), Hung-Wen Chen (4)
(1) Department of Mechanical and Automation Engineering, Da-Yeh University, 112. Shan-Jiau Road, Da-Tsuen, Chang-Hua 515, Taiwan, ROC
(2) Department of Naval Architecture and Marine Engineering, University of National Defense Chung Cheng Institute of Technology, Ta-Shi, Tao-Yuan 335, Taiwan, ROC
(3) Institute of System Engineering, University of National Defense Chung Cheng Institute of Technology, Ta-Shi, Tao-Yuan 335, Taiwan, ROC
(4) Chung-Shan Institute of Science and Technology, Lung-Tan, Tao-Yuan 335, Taiwan, ROC
“Optimum design of multiple intersecting spheres deep-submerged pressure hull”, Ocean Engineering Vol. 31, pp. 177-199, 2004, doi:10.1016/S0029-8018(03)00120-3
ABSTRACT: The multiple intersecting spheres (MIS) pressure hull is a logical derivative of the single unstiffened sphere, which is frequently used for deep operating, small submersibles because of its attractive low buoyancy factor.This paper investigates the optimum design of an MIS deep-submerged pressure hull subjected to hydrostatic pressure, using a powerful optimization procedure combined the extended interior penalty function method (EIPF) with the Davidon–Fletcher–Powell (DFP) method. In this study, the thickness of the shell, the width of the rib-ring, the inner radius of the rib-ring and the angle of intersection of the spherical shell are selected as design variables, and structural failure and human requirements are considered to minimize the buoyancy factor. Additionally, a sensitivity analysis is performed to study the influence of the design variables on the optimal structural strength design.The results reveal that the shell thickness is most important to lobar buckling strength, and that rib-ring width, rib-ring inner radius and spherical shell intersection angle are most important to rib-ring hoop strength. Optimization results may provide a valuable reference for designers.
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