Whipping Response of Ship Hulls from Underwater Explosion Bubble Loading

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Authors
  1. Vernon, T.A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
A summary of the bubble pulsation dynamics of an underwater explosion is presented with the aim of establishing the whipping response of a nearby surface ship. The effects of the initial shock front are not considered and the fluid is assumed to be an incompressible medium. The gas bubble volume dynamics can then be related to far field fluid accelerations assuming that a potential flow condition is satisified. Given the effective mass of the ship comprising the added fluid and buoyancy mass contributions, the forces on the ship resulting from the accelerated flow field can be determined. The theory considers the effects of proximity of the explosion bubble to a free surface, vertical migration of the bubble due to the hydrostatic imbalance, and an energy dissipative mechanism introduced via a pseudo pressure drag coefficient.
Report Number
DREA-TM-86-225 — Technical Memorandum
Date of publication
15 Dec 1986
Number of Pages
49
DSTKIM No
87-00878
CANDIS No
49723
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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