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DTIC ADA480678: 3D Rigid Body Impact Burial Prediction Model (IMPAC... |
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by Defense Technical Information Center |
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Falling of rigid body through air, water, and sediment is |
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investigated experimentally and theoretically. Two |
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experiments were conducted to drop rigid cylinders with |
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the density ratio around 1.8 into shallow water (around |
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13 m deep) in the Monterey Bay (Exp-1) and into the Naval |
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Postgraduate School s swimming pool (Exp-2). During the |
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experiments, we carefully observe cylinder track and |
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burial depth while simultaneously taking gravity cores |
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(in Exp-1). After analyzing the gravity cores, we obtain |
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the bottom sediment density and shear strength profiles. |
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The theoretical work includes the development of 3D rigid |
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body impact burial prediction model (IMPACT35) which |
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contains three components: triple coordinate transform, |
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hydrodynamics of falling rigid object in a single medium |
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(air, water, or sediment) and in multiple media (air- |
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water and water-sediment interfaces). The model predicts |
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the rigid body s trajectory in the water column and |
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burial depth and orientation in the sediment. The |
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experimental data (burial depth, sediment density and |
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shear strength) are used to evaluate the newly developed |
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numerical model. The 3D model shows great improvement to |
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the currently used US Navy s 2D model (i.e., IMPACT28). |
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Date Published: 2018-06-20 21:25:53 |
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Identifier: DTIC_ADA480678 |
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Item Size: 4955218 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; Chu, Peter C ; NAVAL PO... |
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# Uploaded by |
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@chris85 |
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