Publication:
Mine impact burial prediction from one to three dimensions

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Authors
Chu, Peter C.
Subjects
mine impact burial prediction, Kirchhoff–Kelvin equation, IBPM, IMPACT25/28, IMPACT35, drag and lift forces and torques, translation velocity, orientation, burial depth, sediment dynamics, triple coordinate system, mine shape effect, cylindrical mine, Manta mine, Rockan mine
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Date of Issue
2009
Date
2009
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Abstract
The Navy’s mine impact burial prediction model creates a time history of a cylindrical or a noncylindrical mine as it falls through air, water, and sediment. The output of the model is the predicted mine trajectory in air and water columns, burial depth/orientation in sediment, as well as height, area, and volume protruding. Model inputs consist of parameters of environment, mine characteristics, and initial release. This paper reviews near three decades’ effort on model development from one to three dimensions: (1) onedimensional models predict the vertical position of the mine’s center of mass (COM) with the assumption of constant falling angle, (2) two-dimensional models predict the COM position in the x,z plane and the rotation around the y-axis, and (3) three-dimensional models predict the COM position in the x,y,z space and the rotation around the x-, y-, and z-axes. These models are verified using the data collected from mine impact burial experiments. The one-dimensional model only solves one momentum equation (in the z-direction). It cannot predict the mine trajectory and burial depth well. The twodimensional model restricts the mine motion in the x,z plane (which requires motionless for the environmental fluids) and uses incorrect drag coefficients and inaccurate sediment dynamics. The prediction errors are large in the mine trajectory and burial depth prediction (six to ten times larger than the observed depth in sand bottom of the Monterey Bay). The three-dimensional model predicts the trajectory and burial depth relatively well for cylindrical, near-cylindrical mines, and operational mines such as Manta and Rockan mines.
Type
Article
Description
Applied Mechanics Reviews, American Society of Mechanical Engineers, 62, 010802
The article of record as published may be located at http://dx.doi.org/10.1115/1.3013823
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Department
Oceanography
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Citation
Chu, P. C., 2009: Mine impact burial prediction from one to three dimensions. Applied Mechanics Reviews, American Society of Mechanical Engineers, 62, 010802 (paper download).
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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