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Underwater shock‐free surface–structure interaction
Author(s) -
Liu T. G.,
Khoo B. C.,
Yeo K. S.,
Wang C.
Publication year - 2003
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.791
Subject(s) - underwater explosion , underwater , free surface , shock (circulatory) , cavitation , mechanics , moment (physics) , surface (topology) , bubble , shock wave , torque , structural engineering , materials science , physics , classical mechanics , geology , engineering , geometry , mathematics , medicine , oceanography , thermodynamics
Abstract A recently developed numerical method has been employed to evaluate the influence of free surface on shock loading in a cylindrical underwater explosion carried out near to both a free surface and a cylindrical rigid structure. In the usual simulation of underwater shock–structure interaction, the shock loading tends to accelerate/move the (rigid) structure only in the resultant force direction. The presence of a free surface and explosion bubble suggests the existence of a reverse loading and provides an additional torque (rotational moment) on the loaded structure. The numerical results also demonstrate the possible existence of a cavitation zone/region in the immediate vicinity of the free surface due to the near‐surface underwater explosion. Copyright © 2003 John Wiley & Sons, Ltd.