超大型船舶变截面梁分段模型的载荷试验研究

为了验证船体弹性效应对波浪载荷的影响,在拖曳水池进行了某超大型高速船舶的分段模型试验.介绍了分段模型的设计原则,并改进了传统的分段模型,采用变截面梁对船体刚度进行模拟,分析了不同航速与模型分段数量对总弯矩响应中高频和低频成分的影响,并对极限海况下规则波和不规则波中的弯矩响应进行分析,发现了颤振现象,计算了颤振响应在总弯矩中所占的比重.最后,分别依据刚体理论、线性与非线性水弹性理论对该船的波浪载荷进行了预报,通过比较发现刚体和线性水弹性计算结果与低频弯矩吻合很好,而非线性计算结果与总弯矩吻合更好.

The wave load experimental investigation of a segmented model of a very large ship based on variable cross-section beams

In order to verify the elastic effect of the hull on the wave loads,segmented model experiments of a very large high speed ship were carried out in a towing tank.The design principle of the segmented model was introduced,the traditional segmented model was improved,and variable cross-section beams were used to simulate the stiffness of the hull.The effects of different speeds and the number of segments of the model on the medium-high and low frequency components in total bending moment responses were analyzed,the bending moment responses in regular and irregular waves in extreme sea conditions were studied,and the whipping response was found.Furthermore,the proportion of the whipping response in total bending moments was calculated.Finally,the wave loads of this ship were predicted by the rigid theory and linear and nonlinear hydroelastic theory.From the comparison between experimental and theoretical results,it was shown that the rigid and linear hydroelastic results are in good agreement with low frequency moments,and the nonlinear calculation results are in better agreement with total moments.