多点系泊起重船数值分析与试验对比研究

Study of Numerical Simulation and Experimental Comparison about Multi-point Moored Floating Crane Ship

以一艘工作水深46m的现役起重船为研究对象,采用基于全QTF法的时域准静态分析法对实际尺度起重船与系泊系统进行耦合数值分析,并与1:50的模型试验结果进行比较。结果表明:由于不考虑粘性阻尼影响,纵荡、纵摇的计算结果偏大,垂荡运动计算结果较为可信;垂荡、纵摇运动具有一阶低频成分,该响应对起重船的作业安全具有一定的威胁,应当给予重视;粘性阻尼、缆绳动力响应与水深对系泊起重船运动与缆绳张力的影响还有待研究。

Taking a floating crane ship multi-point moored in 46m water depth as an example, the coupled numerical simulation of the floating crane ship and mooring system in actual scale is done using the time domain quasi-static analysis based on full QTF method A model test is performed with a model scale 1：50. The value comparing results show that the surge and pitch calculation values are too large and the heave motion calculation result is reliable not considering the viscous damping effects. Heave and pitch motion have first-order low frequency components and the response is a certain threat to the safety of the floating crane ship. Attention should be given here. Viscous damping, mooring lines＇ dynamic motion, water depth＇s effects on the motion of moored crane ship and lines ＇tension response are still to be studied