The Effect of Deck Deceleration on the Response of Seated Man to Deck Motions Induced by Underwater Explosions
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD BETHESDA United States
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The effect of the deceleration phase of deck response to underwater explosions on the response of seated man to such motions was investigated mathematically using a single-degree-of-freedom model to represent a man. It was concluded that the assumption of no deck deceleration does not result in significant errors for the majority of cases. However, deceleration is significant in situations where the duration of the positive acceleration is less than one-half the apparent natural period of seated man and the ratio of acceleration to deceleration is about 10 or less. Errors introduced by ignoring deceleration may lead to overestimates of casualties.