单体小水线面无人艇总体设计及水动力分析

发布时间：2018-06-25 03:51

  本文选题：单体小水线面无人艇 + 总体设计　； 参考：《江苏科技大学》2016年硕士论文

【摘要】：近年来各国大力发展无人艇技术,针对部分敏感地区或危险水域,通常考虑使用无人艇,且要求无人艇拥有较好的水动力性能,在军用方面,也有一定的隐身要求。无人艇若完全潜入水中,其隐身性能将得到提高,但其通讯能力会受到较大影响。因此本文参考单体小水线面水翼复合高速船及相关船舶船型特点,设计了一种新型单体小水线面无人艇。该无人艇拥有较小的上体结构,且外形较为特殊,具备一定的隐身性能,且能保证其通讯能力。由于国内尚无该型无人艇,论文不仅完成了无人艇的外形设计,也完成了内部布置、机构的设计等工作,同时也完成了无人艇水动力性能的模拟分析。以下为本文完成的具体工作:完成无人艇总体设计,包括无人艇艇形设计、主尺度的确定、舱室划分、无人艇内部构件及机构的设计与建模、无人艇浮态校核等。完成无人艇艇体两侧水翼水动力分析及尾舵的选型与设计。选用NACA00xx系列翼型,通过对比,选出最佳翼型NACA0010;通过计算无人艇浮态变化的浮力损失确定水翼转角;通过公式计算水翼转动后在设计航速下所受合力的合力点位置,确定水翼及翼轴安装位置;最后通过DNV规范计算尾舵舵叶面积,并确定尾舵相关参数。通过国际通用船型Wigley船型阻力的模拟值与实验值及计算值的对比,验证了Finemarine模拟阻力方面的可行性;利用Finemarine,模拟无人艇在体航状态和翼航状态下1-10kn航速下的阻力,并分析不同航速阻力情况;通过后处理软件得到无人艇在不同航速下的航行状态及兴波情况,模拟结果达到了设计的目的。最后根据阻力计算完成了螺旋桨设计及主机选型。基于Finemarine,对单体小水线面无人艇的耐波性进行了模拟分析。通过模拟一级、三级规则波和随机不规则波,分析了无人艇在体航及翼航状态下遭遇横浪及迎浪时的水动力响应。模拟结果表明,在低海况,无人艇水动力性能优良。在高海况及不规则波下,水动力响应较为剧烈,不适宜工作,但能够保证自存。通过设计及模拟分析,本文设计的单体小水线面无人艇实现了设计的目的,但在耐波性能方面存在一些不足。这些问题可以在今后的设计工作中进一步解决和优化。由于国内外尚无单体小水线面船船型特征直接应用到无人艇中的工程实例,本文完成了该无人艇总体设计及内部部分装置设计,并完成了相关性能分析工作,是一次积极有意义的尝试,对今后的研究工作具有一定的参考价值。
[Abstract]:In recent years, many countries have developed the technology of unmanned craft. In view of some sensitive areas or dangerous waters, the use of unmanned craft is usually considered, and the unmanned craft is required to have better hydrodynamic performance. In military, there is also a certain requirement of stealth. The stealthy performance of the unmanned craft will be improved if it is completely submerged, but its communication capability will be greatly affected. In this paper, a new type of single waterline unmanned craft is designed with reference to the characteristics of single waterline hydrofoil composite high speed ship and related ship. The UAV has a small upper structure, a special shape, a certain stealth performance, and can guarantee its communication ability. Since there is no such type of unmanned craft in China, the paper not only completes the shape design of the unmanned craft, but also completes the design of the internal arrangement and mechanism, and also completes the simulation analysis of the hydrodynamic performance of the unmanned craft. The following are the specific works of this paper: complete the overall design of unmanned craft, including unmanned boat shape design, the determination of the main scale, compartment division, the design and modeling of the internal components and mechanisms of the unmanned craft, the floating verification of the unmanned boat, and so on. The hydrodynamic analysis of hydrofoil and the selection and design of tail rudder are completed. NACA00xx series airfoils are selected and the optimum airfoil NACA0010 is selected by comparison. The hydrofoil rotation angle is determined by calculating the buoyancy loss of the change in the floating state of the unmanned craft. The resultant force position of the resultant force after the hydrofoil rotates at the design speed is calculated by the formula. Finally, the area of the tail rudder blade is calculated by DNV code, and the relevant parameters of the tail rudder are determined. The feasibility of Finemarine simulation resistance is verified by comparing the simulated value with the experimental value and the calculated value, and the resistance of the unmanned ship under the 1-10kn speed is simulated by using Finemarine. Through the post-processing software, the navigation state and wave-making of the unmanned craft at different speeds are obtained, and the simulation results reach the purpose of the design. Finally, according to the calculation of resistance, the design of propeller and the selection of main engine are completed. Based on Finemarine, the wave resistance of single waterline unmanned craft is simulated and analyzed. The hydrodynamic responses of the unmanned craft to cross and facing waves are analyzed by simulating the first stage, three level regular waves and random irregular waves. The simulation results show that the hydrodynamic performance of unmanned craft is excellent in low sea conditions. Under high sea conditions and irregular waves, the hydrodynamic response is strong and unsuitable for work, but it can guarantee self-existence. Through the design and simulation analysis, the single waterline unmanned craft designed in this paper has achieved the purpose of design, but there are some shortcomings in the wave resistance performance. These problems can be further solved and optimized in the future design work. Because there is no engineering example that single waterline ship form features have been directly applied to unmanned craft at home and abroad, this paper has completed the overall design of the unmanned craft and the internal part of the device design, and has completed the related performance analysis work. It is a positive and meaningful attempt and has certain reference value for future research work.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U674.77
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本文编号：2064435