Numerical simulation of muzzle blast
conference paper
Structural design methods for naval ships include environmental, operational and military load cases. One of the operational loads acting on a typical naval vessel is the muzzle blast from a gun.
Simulating the muzzle blast load acting on a ship structure with CFD and ALE methods leads to large numerical models with high CPU requirements as a large volume of the surrounding air domain requires meshing.
A numerically efficient method is required to determine the limits of the gun orientation (azimuth and elevation) for the ship structure. When a gun is fired at particular orientations, the structure in the vicinity of the muzzle may be subjected to high loads. This is of particular interest for the latest naval designs which employ thin decking in order to minimize structural weight and cost.
A modified version of the Heaps, Fansler and Schmidt [1], Fansler [2] analytical blast model has been implemented into LSDYNA as a user defined muzzle blast load. This is implemented in a similar manner to the TNO Mine Blast Model [3]. The muzzle blast loading model enables the structural response to be evaluated in a numerically efficient manner.
Simulating the muzzle blast load acting on a ship structure with CFD and ALE methods leads to large numerical models with high CPU requirements as a large volume of the surrounding air domain requires meshing.
A numerically efficient method is required to determine the limits of the gun orientation (azimuth and elevation) for the ship structure. When a gun is fired at particular orientations, the structure in the vicinity of the muzzle may be subjected to high loads. This is of particular interest for the latest naval designs which employ thin decking in order to minimize structural weight and cost.
A modified version of the Heaps, Fansler and Schmidt [1], Fansler [2] analytical blast model has been implemented into LSDYNA as a user defined muzzle blast load. This is implemented in a similar manner to the TNO Mine Blast Model [3]. The muzzle blast loading model enables the structural response to be evaluated in a numerically efficient manner.
TNO Identifier
514434
Source title
23rd MABS - Military Aspects of Blast and Shock, Oxford, United Kingdom, 7-12 September 2014
Collation
6 p.
Files
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