【摘要】 将船舶操纵运动模型和船舶耐波性理论结合起来,建立了适用于求解船舶在随机波浪中运动的六自由度数学模型。该模型采用水平随船坐标系,与操纵运动有关的水动力采用经验公式估算;与耐波性相关的水动力除二阶力外采用从频域到时域的方法,其中一阶波浪力通过脉冲响应函数的卷积求取,记忆效应力由时延函数的卷积表示;对于二阶波浪力则只考虑其定常部分。最后,应用该模型对一艘集装箱船在静水、规则波、随机波下的回转运动进行了预报,并就波浪对回转运动的影响做了讨论。认为一阶力对船舶操纵运动影响不明显;在考察波浪对船舶操纵运动的影响,必须考虑二阶力的作用。更多还原

【Abstract】 In the paper,a six degrees of freedom mathematical model encompassing calm water maneuvering and traditional seakeeping theories is developed to simulate the ship maneuvering motion in random waves.The horizontal body axes system is used in this model.All the hydrodynamic forces and coefficients for maneuveriog are calculated by empirical formulates;and those for seakeeping except the second order wave forces are calculated in the time domain,in which the first order wave forces are the convolution of the impulse response function and the memory effects can be got by the convolution of the time-delay function;and for the second order wave forces,only the constant components are considered.Then,the numerical simulations of the turning motion of a container ship are performed in calm water,regular waves and random waves,the affections of the waves to the turning motion of the ship are also discussed.The results show that the effect of the first order wave forces on the ship maneuvering motion is not obvious and the second order wave forces must be taken into account when researching ship maneuvering motion in waves.更多还原