Jw. Swegle et Sw. Attaway, ON THE FEASIBILITY OF USING SMOOTHED PARTICLE HYDRODYNAMICS FOR UNDERWATER EXPLOSION CALCULATIONS, Computational mechanics, 17(3), 1995, pp. 151-168
SPH (Smoothed Particle Hydrodynamics) is a gridless Lagrangian techniq
ue which is appealing as a possible alternative to numerical technique
s currently used to analyze high deformation impulsive loading events.
In the present study, the SPH algorithm has been subjected to detaile
d testing and analysis to determine the feasibility of using PRONTO/SP
H for the analysis of various types of underwater explosion problems i
nvolving fluid-structure and shock-structure interactions. Of particul
ar interest are effects of bubble formation and collapse and the perma
nent deformation of thin walled structures due to these loadings. Thes
e are exceptionally difficult problems to model. Past attempts with va
rious types of codes have not been satisfactory. Coupling SPH into the
finite element code PRONTO represents a new approach to the problem.
Results show that the method is well-suited for transmission of loads
from underwater explosions to nearby structures, but the calculation o
f late time effects due to acceleration of gravity and bubble buoyancy
will require additional development, and possibly coupling with impli
cit or incompressible methods.