Seakeeping Characteristics for Four Representative U.S. Coast Guard Cutters
Abstract
Motion predictions were made for four representative U.S. Coast Guard vessels. These were the RESOLUTE Class WMEC, the HAMILTON Class WHEC, the POLAR STAR Class WAGB and the new 270 foot class WMEC. These were done by use of the MIT Five Degree-of-Freedom Seakeeping Prediction Program as modified by the Naval Ship Engineering Center. The root-mean-square (rms) values for yaw, sway, pitch and heave displacement as well as vertical displacement, velocity and acceleration at the center of each ship's landing circle were taken directly from the output of the program. These values have correlated well with other seakeeping programs as well as full-scale values and seem reasonable for the ships studied. The roll values, however, were extremely sensitive to the shape of the sea spectra and its modal frequency since the RAO's for roll responses had extremely sharp peaks at resonance.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1977
- Accession Number
- ADA166879
Entities
People
- Glenn M. Ashe