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On the feasibility of using Smoothed Particle Hydrodynamics for underwater explosion calculations

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Abstract

SPH (Smoothed Particle Hydrodynamics) is a gridless Lagrangian technique which is appealing as a possible alternative to numerical techniques currently used to analyze high deformation impulsive loading events. In the present study, the SPH algorithm has been subjected to detailed testing and analysis to determine the feasibility of using PRONTO/SPH for the analysis of various types of underwater explosion problems involving fluid-structure and shock-structure interactions. Of particular interest are effects of bubble formation and collapse and the permanent deformation of thin walled structures due to these loadings. These are exceptionally difficult problems to model. Past attempts with various 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 of late time effects due to acceleration of gravity and bubble buoyancy will require additional development, and possibly coupling with implicit or incompressible methods.

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Authors and Affiliations

  1. Material and Structural Mechanics Department, 1518 Sandia National Laboratories Albuquerque, 87185, New Mexico, USA

    J. W. Swegle & S. W. Attaway

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  1. J. W. Swegle
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  2. S. W. Attaway
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Communicated by S. N. Atluri, 30 May 1995

This work was performed at Sandia National Laboratories, which is operated for the U.S. Department of Energy under Contract No. DE-AC04-94AL85000, and was partially funded by the Naval Surface Warfare Center under WFO proposal #15930816

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Swegle, J.W., Attaway, S.W. On the feasibility of using Smoothed Particle Hydrodynamics for underwater explosion calculations. Computational Mechanics 17, 151–168 (1995). https://doi.org/10.1007/BF00364078

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