odynamic coefficients. Using the method, the paper forecast the fluid power , torque and hydrodynamic coefficients. bination with other hydrodynamic coefficients which are obtained by empirical formula, compile a program to simulate the rotation curve and Z motion curve. The influence in performance of maneuverability caused by the strip longitudinal and cross section shape was studied.РResults show that the method given by the paper is effective. Fluid power, torque and free surface wave changed with the drift angle and radius regularly. The ship have bigger radius than trimaran of the same tonnage and the strip longitudinal and cross section shape have a big affection on ship maneuverability.Р哈尔滨工程大学硕士学位论文РKeywords: Composite small water area trimaran、Maneuverability、Numerical simulation
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