| Autor: |
Lloyd, A. N., Miller, D. K., Pan, H., Cogar, J. R. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2012, Vol. 1426 Issue 1, p1093-1096, 4p, 1 Color Photograph, 2 Black and White Photographs, 1 Diagram, 1 Chart, 1 Graph |
| Abstrakt: |
Accurately modeling blast dynamics is critical in the assessment of structures subjected to blast loading. The current industry standard for modeling blast effects in La Grange based finite element simulations is CONWEP; tabulated pressure data taken directly from blast events. CONWEP is limited, however, and may not always be physically representative of the blast/structural interaction that occurs in the field. Euler hydrocodes provide advantages over CONWEP in that they can capture shock front interaction and model blast surface interfaces with fidelity due to the presence of the working fluid. Euler codes, however, break down over larger time scales due to advection; whereas, Lagrange modeling allows for discrete finite elements with definable boundary interfaces that can be tracked out to longer time scales. Hence, a hybrid approach that couples the Euler blast modeling with La Grange system dynamics is necessary. The objective of this paper is to demonstrate improvements for high explosive overpressure structural response modeling specifically with respect COMP-B high explosive acting upon blasted fragments using a Coupled Euler-La Grange algorithm implemented in Velodyne™. Velodyne results using the Coupled Euler-La Grange algorithm are compared to results from an Euler hydrocode simulation (CTH) and Velodyne simulations using the CONWEP algorithm. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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