龙骨帆船完整稳性研究及应用

发布时间：2018-07-04 12:08

本文选题：龙骨帆船 + 荷载布局　；参考：《集美大学》2016年硕士论文

【摘要】：帆船稳性是指船受到外力作用时,船体产生纵倾和横倾后,恢复倾侧的能力,是帆船航行的基本保障和帆船检验的主要内容,也是帆船设计和使用人员最为关注的问题之一。通常船舶稳性一般仅考虑船舶在静水中的稳性,但实际航行中,波浪对稳性的影响、船舶航行动稳性对安全的影响,两者不容忽视。对于龙骨帆船,海上挂帆航行是一个复杂的过程,航行姿态与常规船舶不同,航行时通常会与水面倾斜一定角度,风帆受风面积大、风压中心高,海上航行的帆船比一般船舶倾覆的安全隐患更大。目前,国内外对龙骨帆船稳性研究的文献较少,为了研究龙骨帆船静水稳性、随浪稳性以及航行状态下的动稳性变化规律,本文以国内某游艇企业自主开发的一艘龙骨帆船为例,展开以下研究工作:1)建立龙骨帆船三维模型,采用可变重量位置变化对稳性影响的计算方法,基于MAXSURF软件进行龙骨帆船静水稳性计算,重点研究乘员布局作为荷载位置变化对龙骨帆船稳性的影响规律,得到乘员布局对稳性影响最大程度分别位于舱内客厅、尾部甲板和上层甲板布局。依据规范,获得不同乘员布局下的满帆作业的安全操帆风速变化范围为3.8m/s至8.8 m/s,即乘员不同的装载位置所能满足规范达到的最大操帆风速相差近57%。2)基于表面积分法进行龙骨帆船随浪稳性研究,分析随浪中不同的波浪参数和船波相对位置对龙骨帆船完整稳性变化的规律。结果表明:波浪要素对龙骨帆船初稳性影响较大,其中船中位于随浪上坡段位置时的初稳性高比静水平面初稳性高减小了近37%。龙骨帆船随浪波峰与随浪下坡段位于船中时大倾角稳性会减小,且发生在横倾范围大于60°下,而对于龙骨帆船随浪波谷与随浪上坡段位于船中时会以横倾角65°左右为界,出现随浪大倾角稳性与静水稳性大小差异呈相反趋势。3)基于帆船运动力学和VPP理论,运用MAXSURF VPP计算龙骨帆船的航行姿态,得到帆船航行的航速与倾角范围。依据航行姿态,建立数值水池,利用CDF数值模拟龙骨帆船在不同航速且强迫横倾航行下的航行动稳性性能。结果表明:龙骨帆船静水强迫横倾10°和20°航行时,帆船在设计航速范围内随着航速的增加复原力矩下降趋势分别为8.0%和6.4%。迎浪航行各工况最大复原力矩与静水航行相比减少量可达到22.40%~53.61%。4)依据CCS规范《2012帆艇检验指南》中对龙骨帆船完整稳性的衡准要求,利用C#语言对Rhinoceros软件进行二次开发,实现计算精度高、计算效率优势明显的龙骨帆船稳性衡准插件系统的开发。
[Abstract]:Sailing stability refers to the ability of the ship to recover the tilting ability when the ship is subjected to external forces. It is the basic guarantee of sailing and the main content of sailing survey. It is also one of the most concerned issues for the design and use of sailboat. Generally, the stability of ships only considers the stability of ships in still water, but in the actual navigation, the influence of wave on stability and the influence of ship dynamic stability on safety can not be ignored. For keel sailing, sailing on the sea is a complicated process. The attitude of sailing is different from that of conventional ships. When sailing, it usually inclines to the surface of the water at a certain angle, and the windsurfing has a large area of wind and a high center of wind pressure. Sailboats sailing at sea pose greater safety risks than the capsizing of ships. At present, there are few literatures on the stability of keel sailboat at home and abroad. In order to study the static water stability of keel sailboat, the variation law of dynamic stability with wave stability and the dynamic stability under sailing state is studied. In this paper, a keel sailing boat developed by a domestic yacht enterprise is taken as an example. The following research work is carried out: 1) the three-dimensional model of the keel sailing boat is established, and the influence of variable weight position on stability is calculated. Based on MAXSURF software, the static water stability calculation of keel sailboat is carried out, and the influence of crew layout as load position on the stability of keel sailboat is studied. The results show that the maximum influence of crew layout on stability is located in the living room of cabin. Tail deck and upper deck layout. According to the norms, The safe operating wind speed of full sail operation with different crew layout varies from 3.8m/s to 8. 8 m / s, that is, the maximum wind speed difference reached by different loading positions of the crew is approximately 57. 2) the keel is based on the surface integration method. A study on the stability of sailboats following waves, The variation of the intact stability of the keel sailboat with different wave parameters and the relative position of the ship wave is analyzed. The results show that the wave factor has a great influence on the initial stability of the keel sailboat, in which the initial stability of the ship in the position of the upper slope with the wave decreases by nearly 37% compared with the initial stability in the static plane. The stability of large dip angle of keel sailboat at midship is reduced when the wave peak and downhill section is in the middle of the ship, and occurs in the range of heeling greater than 60 掳, but the slope angle is about 65 掳when the trough and the upper slope section of the keel sailing boat are in the middle of the ship. On the basis of kinematic mechanics and VPP theory, MAXSURF VPP is used to calculate the navigation attitude of the keel sailboat, and the range of speed and inclination angle is obtained. Based on the attitude of navigation, a numerical pool was established, and the dynamic stability of keel sailing under different speeds and forced heeling was simulated by using CDF. The results show that when the keel sailing with static water forced heeling at 10 掳and 20 掳, the recovery torque decreases by 8.0% and 6.4% respectively with the increase of speed in the range of design speed. According to the criterion of 2012 sail boat inspection guide, according to the standard requirement of the integrity and stability of the keel sailboat, the software Rhinoceros is further developed by using C # language, compared with the static water navigation, the maximum recovery moment of each condition can be reduced to 22.4040 and 53.61.4) according to the criterion of "2012 sail boat inspection guide", this paper makes a second development of the Rhinoceros software by using the C # language. The development of keel sailboat stability leveling plug-in system with high calculation precision and obvious calculation efficiency is realized.
【学位授予单位】：集美大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U661.22

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