U.s. navy underwater sound reference laboratory orlando

#U.s. navy underwater sound reference laboratory orlando code

The implosion of a pressure vessel is a sudden and violent event. For all cases investigated, there is minimal fracture in the collapse, the structure absorbs more than 80% of the initial energy of the system, and the released pressure pulse carries away less than 6% of the initial energy. The energy absorbed by the structure and the energy emitted into the fluid are calculated for additional simulations of underwater pressure vessel implosions. Consequently, the energy emitted as a pressure pulse into the fluid is a small fraction, approximately 5%, of the initial energy. The test case indicates that the structure absorbs the majority (92%) of the initial energy in the system.

The primary test case considered is the implosion of an aluminum cylinder that collapses flat in a mode-2 shape with minimal fracture. The energy metrics provide estimates of the initial energy in the system (potential energy), the energy released into the fluid as a pressure pulse, the energy absorbed by the imploding structure, and the energy absorbed by air trapped within the imploding structure.

(Received 21 June 2013 revised 18 August 2014 accepted 18 September 2014) Energy-based metrics are developed and applied to a numerical test case of implosion of an underwater pressure vessel.

#U.s. navy underwater sound reference laboratory orlando code

Ambrico Naval Undersea Warfare Center, 1176 Howell Street, Building 990, Code 4121, Newport, Rhode Island 02841-1708

Energy balance during underwater implosion of ductile metallic cylinders Ryan E.