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The whipping response of a submerged free-free cylinder due to underwater explosions
conference contribution
posted on 2023-05-23, 14:01 authored by De Candia, S, Roberto Ojeda RabanalRoberto Ojeda Rabanal, Reid, W, Ratcliffe, M, Jonathan BinnsJonathan BinnsUnderwater explosions (UNDEX) generated by torpedos and mines present one of the most significant threats to the survivability of naval vessels. A non-contact UNDEX event produces two distinct pressure loading phenomena: an initial short duration, high frequency shock wave followed by a relatively low frequency pulsating bubble containing the gaseous products of detonation. The pulsating bubble may excite global, beam-like, structural response modes of the vessel, known as UNDEX induced whipping. Depending on the size and position of the explosive charge relative to the vessel, the maximum strain levels during whipping may exceed those during the initial shock phase. Due to the large costs of full-scale explosive trials, development of validated numerical modelling procedures for UNDEX whipping and shock response are required to assess the survivability of naval vessels. An experiment has been conducted to investigate the UNDEX whipping response of a fully submerged cylindrical pipe structure considering the effects of different charge sizes, stand-off distances and longitudinal positions along the hull. It was found that the longitudinal stand-off location has a significant influence on the whipping response and that the peak whipping response may not always occur at the stand-off point.
Funding
Australian Research Council
ASC Pty Ltd
Austal Limited
Babcock International Group
PMB Defence Engineering Pty Ltd
Serco Australia Pty Ltd
Thales Australian Ltd
History
Publication title
Proceedings of the Pacific 2017 International Maritime ConferencePagination
1-8Department/School
Australian Maritime CollegePublisher
IMCPlace of publication
Sydney, AustraliaEvent title
Pacific 2017 International Maritime ConferenceEvent Venue
Sydney, AustraliaDate of Event (Start Date)
2017-10-03Date of Event (End Date)
2017-10-05Rights statement
Copyright unknownRepository Status
- Restricted