超大型VLCC波激振动和砰击振动模型试验研究

Experimental investigations of springing and slamming responses of a ultra-VLCC

船舶的波激振动和砰击振动对船舶结构的安全性有较大影响。文章以一艘超大型VLCC为研究对象,通过变截面梁分段模型试验方法对船舶在规则波和不规则波中波激振动和砰击振动响应进行了比较分析,介绍了船模波浪载荷试验中模型的设计原则,通过静水试验得到了船体梁垂向振动频率特性、振动阻尼和静水兴波弯矩等参数,通过规则波和不规则波试验分析了波高、波浪周期和装载状态等因素对波激振动和砰击振动的影响。该文的研究结果对大型船舶的结构设计具有一定的指导意义。

The springing and slamming have a great influence on the safety of ship structures. Based on the method of variable cross-section beam segmented model tests, the analysis of springing and slamming re-sponses for a ultra-VLCC in regular and irregular waves is presented. The design principle of the segmented model is introduced, the vertical vibration frequency of hull girder, damping ratios and wave bending mo-ment in still water are obtained from the still water tests, and the influence of wave height, wave period and loading condition on springing and slamming responses is analyzed in the regular and irregular waves. The research results in this paper have a certain guiding significance for the design of large ship structure.