Modeling of underwater bomb trajectory for mine clearance

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Author
Chu, Peter C.
Bushnell, Jillene
Fan, Chenwu
Watson, Kennard P.
Date
2011Metadata
Show full item recordAbstract
The falling of a Joint Direct Attack Munition (JDAM) through a water column was modeled using a six degrees of freedom
model (called STRIKE35), which contains three components: hydrodynamics, semi-empirical determination of the drag/
lift/torque coefficients (depending on the Reynolds number and the angle of attack), and water surface characteristics. To
validate and verify this model, three underwater bomb trajectory tests were conducted in the Naval Air Warfare Center,
Weapons Division (NAWC/WD) in the middle of Indian Wells Valley, California. During the test, several JDAMs were
dropped from an airplane into two frustum ponds with the same bottom diameter of approximately 30.5 m, different
surface diameters (61 m, 79 m), and different depths (7.6 m, 12.1 m). High-speed digital cameras with light/pressure
sensors, and a global positioning system were used to record the location and orientation of JDAMs. Model–data inter
comparison shows the capability of STRIKE35, which may lead to a new approach (breaching technology) of sea mine
clearance in very shallow water (water depth less than 12.2 m, i.e. 40 ft).
Description
Journal of Defense Modeling and Simulation, the Society for Modeling and Simulation International, 8 (1)
The article of record as published may be located at http://dx.doi.org/10.1177/1548512910387807
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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.Collections
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