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Accession Number ADA571589
Title Optimum Vessel Performance in Evolving Nonlinear Wave Fields.
Publication Date Nov 2012
Media Count 38p
Personal Author R. F. Beck
Abstract This report summarizes the research conducted under the MURI entitled 'Optimal Vessel Maneuvering in Evolving Nonlinear Wave Fields.' A radar system was developed to measure the wave field around the ship. A nonlinear pseudo-spectral wave model that accounts for wave-wave interactions, wave-current interactions, wave breaking and wind-wave effects has been developed to forecast in time and space the evolving waves around the ship. The radar wave field predictions that initialize the wave field model are improved using assimilation techniques. Two techniques were developed to compute the responses of the ship to the predicted wave field: A body-exact strip theory and a FFT accelerated boundary element method. The optimal path through the wave field that minimizes ship motions and travel time is found using a new dynamic programing model. Various control algorithms were investigated to allow the ship to follow the optimum path.
Keywords Maneuvers
Mathematical prediction
Measurement
Nonlinear systems
Ocean surface
Ocean waves
Optimal path
Optimization
Paths
Radar
Radar wave measurements
Ship maneuvering and control
Ship motion
Ships
Wave field evolution


 
Source Agency Non Paid ADAS
NTIS Subject Category 47C - Physical & Chemical Oceanography
47A - Marine Engineering
63H - Radiofrequency Detection
Corporate Author Michigan Univ., Ann Arbor. Dept. of Naval Architecture and Marine Engineering.
Document Type Technical report
Title Note Final rept. 1 Apr 2005-31 Aug 2012.
NTIS Issue Number 1316
Contract Number N00014-05-1-0537

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