تحلیل ریاضی غیرخطی مدل تک بدنه شناور در حال حرکت به سمت جلو در دریا

تحلیل ریاضی غیرخطی مدل  تک بدنه شناور در حال حرکت به سمت جلو در دریا که اطلاعاتی جامع را در اختیار شما می گذارد.

زبان مقاله انگلیسی میباشد، که به قلم alex Van Deyzen از دانشگاه دلف کشور هلند خدمتتان ارائه شده است .

SUMMARY
A nonlinear mathematical model for the simulation of motions and accelerations of planing monohulls, having a constant deadrise angle, in head waves has been formulated. The model is based on 2-dimensional strip theory. The original model, developed by Keuning 9), who based his model on Zarnick (25), is extended to three degrees of freedom: surge, heave and pitch motion can be simulated. The simulations can be carried out for a planing boat sailing in (ir)regular head seas, using either a constant forward speed or constant thrust. The hydromechanic coefficients in the equations of motion are determined by a combination of theoretical and empirical relationships. The sectional hydromechanic forces are determined by the theory of a wedge penetrating a water surface. The wave excitation in vertical direction is directly integrated in the expressions for the hydromechanic forces and is caused by the vertical orbital velocity in the wave and the geometrical properties of the wave, altering the total wetted length and the sectional wetted breadth and immersion. An overall frictional resistance has been estimated. A constant thrust force can be set as input. When simulating with a constant thrust, the surge motion is induced by the frictional resistance and the horizontal component of the hydrodynamic force (hull pressure resistance).