Parallel computing of the underwater explosion cavitation effects on full-scale ship structures

Abstract

As well as shock wave and bubble pulse loading, cavitation also has very significant influences on the dynamic response of surface ships and other near-surface marine structures to underwater explosive loadings. In this paper, the acoustic-structure coupling method embedded in ABAQUS is adopted to do numerical analysis of underwater explosion considering cavitation. Both the shape of bulk cavitation region and local cavitation region are obtained, and they are in good agreement with analytical results. The duration of reloading is several times longer than that of a shock wave. In the end, both the single computation and parallel computation of the cavitation effect on the dynamic responses of a full-scale ship are presented, which proved that reloading caused by cavitation is non-ignorable. All these results are helpful in understanding underwater explosion cavitation effects.

Keywords

underwater explosion / cavitation / parallel computation / full-scale ship

References

[1] Arons A.B. Long range shock propagation in underwater explosion phenomena II. Underwater Explosions Compendium, 1943, 1: 10

[2] Cole R.H. Underwater explosion, 1948, Princeton: Princeton University Press

[3] Hakan U. Dynamic response of a catamaran-hull ship subjected to underwater explosions, 1998, Monterey, California: Naval Postgraduate School

[4] Hollyer RS (1959). Direct shock wave damage to merchant ships from non-contact underwater explosions. ANAME, 773–784. https://www.sharcnet.ca/Software/Abaqus/6.11.2/books/stm/default.htm. Coupled acoustic-structural medium analysis. March 27th, 2012.

[5] Hunter K.S. Global-shape-function models of an underwater explosions bubble, 2001, Colorado: University of Colorado

[6] Keil A.H. response of ships to underwater explosions. Transactions of Society of Naval Architects and Marine Engineers, 1961, 69: 366-410

[7] Lloyd H., Raphael G. Structural response of submerged air-backed plates by experimental and numerical analyses. Shock and Vibration, 2000, 7: 333-341

[8] Makinen K. Cavitation models for structures excited by a plane shock wave. Journal of Fluids and Structures, 1998, 12: 85-101

[9] Marcus MH (1983). The response of a cylindrical shell to bulk cavitation loading. NSWC TR, 81–295.

[10] Michael M (1978). Explosion effects and properties: Part II Explosion Effects in the Water. AD-A056694.

[11] Rajendran Reloading effects on plane plates subjected to non-contact underwater explosion. Journal of Materials Processing Technology, 2008, 206: 275-281

[12] Shin Y.S. Naval ship-shock design and analysis, 1996, Monterey, California: Course Notes for Underwater Shock Analysis, Naval Postgraduate School

[13] Stevent L.W. Cavitation effects on a ship-like box structure subjected to an underwater explosion, 1998, Monterey, California: Naval Postgraduate School

[14] Van Aanhold J.E. Underwater shock response analysis of a floating vessel. Shock and Vibration, 1998, 5: 53-59

[15] Webster K.G. Investigation of close proximity underwater explosion effects on a ship-like structure using the multi-material arbitrary Lagrangian Eulerian finite element method, 2007, Virginia: Virginia Polytechnic Institute and State University

[16] Zamyshlyayev BV (1973). Dynamic loads in underwater explosion. AD-757183.