中文摘要：

在考虑吊重空间摆动和船体运动的耦合以及流体动力学效应、波浪力、锚索的非线性恢复力等条件下,建立了锚泊起重船动力学模型。分析了起重船在规则波作用下吊重的摆动特征,当外部波浪频率趋近于吊重特征频率时,吊重会发生大的晃动。比较了船舶在理想简谐运动条件下与在规则波条件下吊重的摆动特征。分析结果表明：作用在船体上的非线性载荷对船舶和吊重的运动影响比较明显。

英文摘要：

An eight-degree-of-freedom time domain mathematical model was used to simulate moored crane ship dynamics numerically.This model considered large-amplitude load swing of the hull,hydrodynamic memory effects,nonlinear drag forces acting on the hull,wave forces,and nonlinear restoring force characteristics of a mooring system.The dynamics of a crane ship was investigated for two different external excitations：the idealized case of purely harmonics pitching motion of the ship and force acting on the hull due to incoming regular waves.The results indicate that the large resonant oscillations may occur if the wave frequency approaches one of the system＇s eigenfrequencies.The load swing angle range is obviously affected by nonlinearity of the restoring force of the mooring system.