【作者】 贾敬蓓；

【导师】 宗智；

【作者基本信息】 大连理工大学 ， 船舶与海洋结构物设计制造， 2010， 博士

【摘要】 本文通过三体船的系列模型试验,系统研究了三体船构型对三体船阻力性能和运动性能的影响。根据试验结果和分析,针对Fn>0.6的半滑行高速段,提出了“半滑行前三体船”这一新的三体船船型,并将这种新的三体船船型应用于台湾海峡高速客货运输船的研发设计中。另外,本文还基于冯·卡门砰击理论的基本思想,给出了任意形状二维剖面砰击压力的一种数值计算方法。本文的结构安排如下：首先,简要介绍了目前高速三体船的发展现状,对国内外关于高速三体船的研究方法和研究现状做了概述,确定了本论文对高速三体船的研究方法和研究重点。其次,对本文试验所用的三体船模型进行了型线设计和构型设计,并详细介绍了具体的模型试验方案。在本论文第三章,根据静水阻力试验结果,分析了三体船的不同构型对静水阻力性能的影响。分析结果表明,在不同的傅汝德数区间内,静水阻力性能较优的三体船构型是互不相同的。根据试验结果,给出了七个不同傅汝德数区间内三体船的静水阻力优化构型。值得注意的是,在Fn>0.6的半滑行高速段,三体船侧体的纵向位置位于主体船舯之前能够显著改善三体船的静水阻力性能。在本论文第四章,根据运动响应试验结果,分析了三体船在规则波中的垂荡、纵摇、横摇等运动响应特性,讨论了不同航速下,三体船构型对三体船运动性能和规则波中总阻力的影响。分析结果表明,对于Fn>0.6的半滑行高速段,将侧体纵向位置选取在主体船舯或舯前的位置能够获得整体上相对较优的运动性能。在本论文第五章,根据模型试验结果及分析,针对Fn>0.6的半滑行高速段,提出了侧体纵向位置位于主体船舯之前的“半滑行前三体船”这一新的三体船船型,并将此船型应用在台湾海峡高速客货运输船的船型研发设计中。最后,基于冯·卡门砰击理论的基本思想,给出了任意形状二维剖面砰击压力的一种数值计算方法,并将该数值计算方法应用在三体船横剖面的砰击压力计算中。更多还原

【Abstract】 The resistance and motion characteristics of a typical trimaran have been studied through model experiments. The experiments are composed of two parts:resistance experiments in calm water and motion experiments in regular waves. The tested trimaran model consists of a single mainhull and two small sidehulls.The resistance experiments for different trimaran configurations in calm water were carried out over a range of Froude Numbers, which varies form 0.1 to 1.0. The experimental results show that the best trimaran configuration for calm water resistance varies with the Froude Number. The most important discovery of the tests in this thesis is that at high speed Fn> 0.6, placing the sidehulls in front of the mainhull’s midship yields better resistance performance. The tested Froude Number interval was divided into seven sections, and the best configuration for trimaran resistance performance in calm water was presented for each section.The motion experiments in regular waves were conducted in four typical Froude Numbers. The trimaran motion characteristics, including heave RAO, pitch RAO, roll RAO and total resistance in regular waves, were studied. The peak values of each motion response and total resistance were compared between different configurations. The experimental results show that, for the semi-planing high speed section of Fn> 0.6, placing the sidehulls in or in front of the mainhull’s midship yield relatively better motion performance.Based on the experiment results, for the semi-planing high speed section of Fn> 0.6, a new type of trimaran configuration named "semi-planing fore-body trimaran", is developed in the thesis.A numerical computation method, based on Von Karman slamming theory, was presented for slamming pressure of two-dimensional section with arbitrary shape. Moreover, the method was applied to the tested trimaran model.更多还原