Design of a multi-DOF tuned mounting fixture for the Navy's mediumweight shock machine
Cox, David M.
Shin, Young S.
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A near miss underwater explosion can significantly damage improperly shock hardened combat systems equipment and render the ship unable to 'fight hurt'. MIL-S-901D currently requires shock qualifying mediumweight equipment to a 'generic' shock excitation on the Navy's Mediumweight Shock Machine (MWSM). This shock excitation is severe, but not always characteristic of the actual ship structure response to an underwater explosion. This study proposes a design modification which will allow using a multi-DOF equipment mounting fixture on the MWSM which can be 'tuned' to simulate shipboard shock characteristics based on modal testing and previous ship shock trial data. Equipment qualified in this manner could be highly relied on to survive in battle.
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