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The whipping response of a submerged platform subjected to near-field, non-contact underwater explosions
report
posted on 2023-05-25, 19:09 authored by De Candia, S, Roberto Ojeda RabanalRoberto Ojeda Rabanal, Reid, W, Ratcliffe, MAn experimental investigation of an underwater explosion (UNDEX) induced whipping response was conducted on a submerged platform. The platform was subjected to eight near-field, non-contact UNDEX events, using two explosive charge sizes at three longitudinal positions along the hull length, coinciding with predetermined peak and node positions of the natural bending mode responses of the platform. We found that stand-off positions at amidships, coinciding with the peak response of the first bending mode, produced the most severe whipping response. Stand-off positions located at the node of the first bending mode had a greatly reduced whipping response for the same charge size and transverse stand-off distance. Stand-off positions away from amidships demonstrated multiple bending mode responses, which for the larger charge size resulted in the peak response occurring away from the initial stand-off position. These results have an implication on how navy platform assessments are undertaken, and suggests that whipping responses require more detailed consideration to understand a platform's limitations against an UNDEX event.
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
Research ReportCommissioning body
Department of Defence, Science and TechnologyPagination
61Department/School
Australian Maritime CollegePublisher
Department of Defence, Science and TechnologyPlace of publication
AustraliaRepository Status
- Restricted