Experimental Study of Parametric Exciting Roll Damping in Calm Water
For the unique motion characteristics of ship parametric roll,a ship model parametrically ex-citing roll experiment on calm water was designed to stimulate stability parameters,and the rolling damping measurement method consistent with the ship parametric rolling characteristics was studied.Based on the ship parametric rolling mechanism,an experimental system was designed,which consis-ted of a vibration exciter to excite the height of the ship model's center of gravity,a control motor and a measuring and controlling instrument to measure the ship model's motion.Based on the energy bal-ance of damping dissipation,excitation release and restoring moment,the calculation formula of roll-ing damping coefficient was derived.The experimental results of static water parametric rolling damp-ing measurement in open-air ship model pool show that the rolling amplitude of steady-state response is continuous and stable,the large rolling damping is measurable,and the experimental measurement has good repeatability.
parametric rollship model testroll dampingexcited rolling
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