Surface ship shock modeling and simulation: two-dimensional analysis
Abstract
The modeling and simulation of the response of a surface
ship system to underwater explosion requires an understanding
of many different subject areas. These include the process
of underwater explosion events, shock wave propagation, explosion
gas bubble behavior and bubble-pulse loading, bulk
and local cavitation, free surface effect, fluid-structure interaction,
and structural dynamics. This paper investigates the
effects of fluid-structure interaction and cavitation on the response
of a surface ship using USA-NASTRAN-CFA code.
First, the one-dimensional Bleich-Sandler model is used to
validate the approach, and second, the underwater shock response
of a two-dimensional mid-section model of a surface
ship is predicted with a surrounding fluid model using a constitutive
equation of a bilinear fluid which does not allow
transmission of negative pressures.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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