Maneuvering Performance of High-Speed Ships with Effect of Roll Motion
STEVENS INST OF TECH HOBOKEN NJ DAVIDSON LAB
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Equations of yaw, sway, roll and rudder motions are formulated to represent realistic maneuvering behavior of high-speed ships such as destroyers. Important coupling terms between yaw, sway, roll and rudder were included on the basis of recent captive model test results of a high-speed ship. A series of computer runs was made by using the equations of yaw, sway, roll and rudder motions. Results indicate substantial coupling effects between yaw, roll, and rudder, which introduce changes in maneuvering characteristics and reduce course stability in high-speed operations. These effects together with relatively small GM which is typical for certain high-speed ships produce large rolling motions in a seaway as frequently observed in actual operations. Results of digital simulations and captive model tests clearly indicate the major contributing factors to such excessive rolling motions at sea.
- Marine Engineering
- Fluid Mechanics