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This and the next 2 images are from:
Cho-Chung Liang (1) and Yuh-Shiou Tai (2)
(1) Department of Mechanical and Automation Engineering, Da-Yeh University, 112 Shan-Jeau Road, Dah-Tsuen, Changhwa 515, Taiwan, ROC
(2) Department of Civil Engineering, R.O.C. Military Academy, 1 Wei-Wu Road, Fengshan 830, Taiwan, ROC
“Shock responses of a surface ship subjected to noncontact underwater explosions”, Ocean Engineering, Vol. 33, pp 748-772, 2006
ABSTRACT: In combat operations, a warship can be subjected to air blast and underwater shock loading, which if detonated close to the ship can damage the vessel form a dished for hull plating or more serious holing of the hull. This investigation develops a procedure which couples the nonlinear finite element method with doubly asymptotic approximation method, and which considers the effects of transient dynamic, geometrical nonlinear, elastoplastic material behavior and fluid–structure interaction. This work addresses the problem of transient responses of a 2000-ton patrol-boat subjected to an underwater explosion. The KSFZ0.8 is adopted to describe the shock severity. Additionally, the shock loading history along keel, the acceleration, velocity and displacement time histories are presented. Furthermore, the study elucidates the plastic zone spread phenomena and deformed diagram of the ship. Information on transient responses of the ship to underwater shock is useful in designing ship hulls so as to enhance their resistance to underwater shock damage.
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