Ship impact modeling of underwater explosion

• Autorzy: Grządziela A.
• Języki publikacji: EN

Abstrakty

EN

Ship shock tests have been conducted for shock qualification of hull integrity and proper operation systems and subsystems. The ship shock trial identifies design and construction and it also validates shock hardening criteria. The main problem is that ship shock trials are costly. Numerical modelling and simulation, using FEM, may provide information to look into the details of fluid model, dynamic characteristics of ship hull and its internal component. The ship shock modelling and simulation has been performed and the predicted results were compared with ship shock test data made into sea trials. The preliminary studies of shock analysis approach are presented and the important parameters are discussed. The course of pressure changes in the shock wave and the acceleration of the ship hull during an underwater explosion in a fixed point, coating elements with chosen junction forces (example), designation of degrees of freedom of rectangular plate, simplified diagram of interactions in the process of detention in the hull of a ship, analysis of the acceleration of the Newmark method, calculations based on central difference method, schematic anchor launch, layout of the apparatus and the conditions for an explosion, the course of the accelerations recorded in the ship's hull, The course of simulation of the acceleration are presented in the paper.

Słowa kluczowe

EN

ship hull; simulation; underwater explosion

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2011
• Tom: Vol. 18, No. 2
• Strony: 145--152
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Grządziela A.

• Polish Naval Academy, Mechanical Electrical Faculty Smidowicza Street 69, 81-103 Gdynia, Poland tel.: [phone], fax: [phone],

Bibliografia

• [1] Cole, R. H., Underwater explosions, Princeton University Press, 1948.
• [2] Young, S., Shin, Ship shock modeling and simulation for far-field underwater explosion, Computers and Structures, 82, pp. 2211–2219, 2004.
• [3] DeRuntz, Jr, J. A., The underwater shock analysis code and its application, Proc 60th Shock Vib Symp, 1: 89–107, 1989.
• [4] Costanzo, F. A, Gordon, J. D., An analysis of bulk cavitation in deep water, DTNSRDC, UERD Report, May 1980
• [5] Hallquist, J. O., LS-DYNA Theoretical Manual, Livermore Software Technology Corporation, Livermore, CA 1998.
• [6] Malone, P. E, Shin, Y. S., Sensitivity analysis of coupled fluid volume to ship shock simulation, Proc 71st Shock Vib Symp, 2000.