中文摘要：

采用多刚体动力学方法建立缆索的力学模型,根据得到的KANE运动力学方程,利用四阶龙格库塔法在时域内进行求解并分析缆索的动力特性。对于单根锚链,采用多刚体法和有限元法进行计算,并将计算结果和相应的试验结果进行比较,验证了多刚体法在锚链动力分析中的可靠性。在此基础上考察多刚体法在钢缆动力分析中的适用性。通过改变链环长度,比较模型缆上端点的张力变化,由计算结果发现对于环长和链长的比值在一定范围内,多刚体法可以用于缆的动力分析。

英文摘要：

Based on the method of muti-body system dynamics,the dynamic model of mooring lines was established.Kane method was employed to obtain the dynamic equations.The dynamic response of the mooring lines can be calculated by the fourth-order Runge-Kutta method.As to chains,the simulation by the multi-body method was carried out.The results were compared with the experimental ones.The comparison results validated that the method is available in the dynamic analysis of chains.The multi-body system dynamics was applied to the dynamic analysis of cables by changing chain-link length and compare the upper end tension of the cable.From the results,it can be found that in the certain range of different ratios of link length to total cable length,the multi-body method can be adopted in the dynamic analysis of cables.