摘要
为了更深入地研究船舶的鞭状效应,在拖曳水池中对某船进行了艏部砰击及鞭状效应分段模型试验研究。提出了一种可以考虑砰击力的非线性水弹性计算方法。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以更好地接近实船。在规则波迎浪下观察到了严重的艏部砰击现象。试验数据表明,当波高从5.6m增大到21m时,由于鞭状效应原因,总弯矩相比低频波浪弯矩的增大值从24.64%增长到92.02%。最后,将不同海况下的测量结果与基于线性与非线性水弹性理论的计算结果进行了比较分析,初步验证了文中方法和程序在预报船体波浪载荷中的适用性。
In order to develop a better understanding of the whipping responses of the ship, segmented ship model experiments on bow slamming and whipping of a ship are carried out at the test tank. The nonlinear hydroelasticity method considering slamming loads is proposed. The traditional segmented model is improved, and the variable cross-section beams are used to simulate the stiffness of the hull better. Severe bow slamming is observed when the model is in head-following regular waves. Experimental results show that when wave height increases from 5.6 m to 21 m, mean value of total moment increases from 24.64% to 92.02% compared with that of wave moment because of servere whipping. Finally, the measured results on the central hull in different sea states are compared with those calculated by linear hydroelasticity theory and nonlinear hydroelastieity theory, and it indicates that the present method and program can predict the wave loads properly.
出处
《船舶力学》
EI
北大核心
2012年第3期246-253,共8页
Journal of Ship Mechanics
基金
Supported by the National Natural Science Foundation (51079034)
