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Full-Text Articles in Nuclear Engineering
Mitigation Of Shock Waves In A Cylindrical Tunnel By Foam, Grant W. Fondaw
Mitigation Of Shock Waves In A Cylindrical Tunnel By Foam, Grant W. Fondaw
Theses and Dissertations
This study investigated the effectiveness of foam linings in mitigating shock waves in tunnels. A polyurethane foam liner of varying density, crush strength and thickness was modeled inside a 1 meter radius tunnel and an explosion of 1.25 kg of plastic explosive was simulated. Using CTH, an Eulerian- Lagrangian hydrodynamics code from Sandia National Laboratories, the overpressures were computed and compared graphically to determine the effect of varying each foam parameter. The walls of the tunnel consisted of a perfectly reflecting boundary, and in some cases, a foam liner. Low density foam provided the most shock attenuation. with a 20 …
Amplification Of Shock Overpressure By Reflection Within Concave Corners, John E. Loftis
Amplification Of Shock Overpressure By Reflection Within Concave Corners, John E. Loftis
Theses and Dissertations
In this study, CTH, a production hydrodynamics code developed and provided by Sandia National Laboratories. modeled the interaction of a shock wave with tall V-shaped buildings with various wall lengths and vertex angles. The purpose of this study was to determine the degree to which the length and vertex angle affect the peak overpressure at the vertex. CTH performed two- dimensional Eulerian-Lagrangian computations to obtain solutions of this problem. The models were cast in two-dimensional rectangular geometry on a horizontal plane because of the computational costs of three-dimensional calculations. This geometry simulates tall buildings exposed to a tall Mach stem …