超高速断级滑行艇推进系统工况配合特性的研究

实现超高速断级滑行艇实艇的船机桨最佳匹配是一个复杂的过程,根据一型14 m实艇研制过程,在设计阶段结合同类实艇统计的经验和模型试验的综合分析方法,合理确定艇的目标航速.在预试航阶段,面对实艇船机桨匹配的难题,通过综合分析主机功率、船体阻力和表面桨三者的特性曲线之间的关系,同时分析预试航水面条件对航速的影响,找到船机桨不能最佳匹配的主要原因是表面桨的工作效率,由此提出解决问题的技术途径,使实艇达到目标航速.     

表面桨实用设计方法

为使表面桨设计更为简便,利用rose的表面桨系列模型试验图谱,采用型船的试航数据分析出的推力修正系数和效率修正系数,考虑表面桨垂向力对艇阻力的影响,给出型船修正系数的求取方法以及表面桨要素优化和航速预报的方法。通过10.3 m无人艇设计实例与实艇试航,预报值与实测值吻合较好,证明该方法计算精度较高且计算简单。     

高速水面效应实验艇

日本技本公司正在试制一种利用水面效应提高船速的高速实验艇。实验艇的尺寸约为实用艇的二分之一,艇长20米、排水量20吨、设计航速为50节以上。该艇是日本防卫厅委托研制的。实用化的水面效应艇的航速可达100节,它将用作为海上自卫队的导弹快艇。技本公司足从1983年开始研究水面效应艇的。通过实验艇的研制与试航,今后将进一步完善姿态控制装置,以减轻艇身因波浪而产生的振动对乘员及电子设备所产生的不良影响,并且实测该艇在各种波浪条件下是否能正常航行等技术数据。     

水翼艇喷水推进系统可调进水口的研制

本文介绍了新颖的可调进水口的工作原理、结构特点和实艇试航情况,证明可调进水口是水翼艇一种较为理想的进水口型式。     

槽道水翼滑行艇快速性能研究

本文论述槽道水翼滑行艇的基本原理、快速性能及其及化规律。通过模型试验、中间艇试验和实部的航行试验，证实了槽道水翼以及与尾压板的联合作用，使槽道型滑行般的阻力减小，航行姿态得到调整和改善，艇的超载能力等综合航海性能有明显的提高。模型试验结果表明槽道水翼使艇体总阻力平均减小25％左右；中间试验艇的航速提高了8％；实船试航航速提高了18％；负荷超载能力增加15％。通过对试验结果的分析，给出对设计有参考意义的结论。     

呆木对改善中速艇回转性的作用

为减少艇的横摇和使摇摆衰减快而采取增设呆木的措施，通过实艇对比证明，它会使尾部平底及上层建筑庞大的中速艇的航向稳定性和回转性都变好，本文通过在模型在风洞 的一系列测压试验与研究，阐明呆木对改善中速艇回转性的作用原理，从而改变了人们一直认为“加呆木对艇的回转性不利”的概念，此外，试验表明，已设置呆木的艇，如再增凤水平或竖舭板，则它回转性将产生不良影响，特别是竖舭板。     

43m内河新型高速水政执法艇设计

为满足水上执法部门综合执法和指挥工作的需求,从设计思想、总体布置、结构材料选择、空船重量控制、振动噪声控制等方面进行研究,设计了具有多功能、一体化的综合管理移动平台——43 m内河新型高速水政执法艇.实船试航结果表明:该艇设计合理,会议室、工作室、驾驶室实测噪声指标均可控制在55 dB以内,实测航速达到并略超过设计航速指标,各项性能指标均达到设计要求,性能优良.     

基于自适应专家S面算法的微小型USV控制系统设计

研究一类微小型水面无人艇(unmanned surface vessel,USV)的运动控制系统设计问题,提出了一种自适应专家S面运动控制算法。首先,基于STM32-ARM核心板设计了一类微小型无人艇的运动控制系统,基于Labwindows/CVI软件开发了上位机监控系统;其次,充分融合专家系统和S面控制算法的优势,提出了一种自适应专家S面运动控制算法,用于微小型无人艇的航速和航向控制;最后以所研制的"神龙号"微小型无人艇为载体,通过大量的水池试验和外场试验,验证了所设计和开发的运动控制系统的有效性和可靠性;同时通过对比试验,体现出了所提出的自适应专家S面控制算法在无人艇航向和航速控制方面的优越性。     

高速深V型小艇耐波性试验研究

深V型艇与传统圆舭型小艇相比,在耐波性能上有较大改善。文章通过8.5 m小艇模型试验和实艇耐波性试验,系统研究了艇型V度对阻力的影响和横剖面形状对耐波性的影响,研究结果显示:对于载荷较重和航速较低的排水型船,若采用极深V型艇,可以同时获得更好的推进性能和耐波性。     

英辉南方造船设计建造的“海琴”双体船顺利试航

<正>12月22日,英辉南方造船(广州番禺)有限公司为珠海高速客轮公司设计建造的铝合金双体高速客船——"海琴"船顺利完成试航。在试航过程中,该船试验航速达38kn,最大航速曾达40kn,远超过设计航速34kn,船舶操纵性良好,各种设备都一次通过CCS检验,各项性能均达到或超过设计要求。     

首艘尖头蜗尾船型的研究

本文阐述了监督73~*艇的船型研究要点,文中给出了该艇船模快速性、操纵性试验主要结果以及实船试航结果。     

Factors Influencing Behavior in a Boating Speed Zone

The greatest source of human-related mortality for endangered Florida manatees is collisions with watercraft. Regulation of boat speeds is the principal management tool to minimize this threat. Demands on law enforcement limit their ability to monitor boater behavior and managers seek alternative strategies to increase compliance. The purposes of this study were to: (1) explore the effectiveness of an on-site sign to enhance boater compliance in a boating speed zone, and (2) examine the environmental and boating characteristics that influence the probability of compliance. Signs designed to increase compliance were posted halfway through the 18-week study period. The signs were not related to compliance level. Logistic regression models showed that only time of day and boat type were significantly related to compliance. Results suggest that passive methods of persuasion may not be an effective means of influencing boater behavior.     

基于遗传算法的带有调纵倾尾板及拦截器的滑行艇水动力性能评估及优化（英文）

Nowadays, several stern devices are attracting a great deal of attention. The control surface is an effective apparatus for improving the hydrodynamic performance of planing hulls and is considered an important element in the design of planing hulls. Control surfaces produce forces and a pitching moment due to the pressure distribution that they cause, which can be used to change the running state of high-speed marine boats. This work elaborates a new study to evaluate the hydrodynamic performance of a planing boat with a trim tab and an interceptor, and optimizes them by using an optimization algorithm. The trim tab and the interceptor have been used to optimize the running trim and motion control of semi-planing and planing boats at various speeds and sea conditions for many years. In this paper, the usage of trim tab is mathematically verified and experimental equations are utilized to optimize the performance of a planing boat at a specificd trim angle by using an optimization algorithm. The genetic algorithm(GA) is one of the most useful optimizing methods and is used in this study. The planing boat equations were programmed according to Savitsky's equations and then analyzed in the framework of the GA-based optimization for performance improvement of theplaning hull. The optimal design of trim tab and interceptor for planing boat can be considered a multiobjective problem. The input data of GA include different parameters, such as speed, longitudinal center of gravity, and deadrise angle. We can extract the best range of forecasting the planing boat longitudinal center of gravity, the angle of the trim, and the least drag force at the best trim angle of the boat.     

顶推船队耐波性试验研究

介绍顶推船队耐波性试验,测量不同航速、不同浪向角对应的驳船和推轮纵摇角、横摇角、重心处垂向加速度和升沉幅值、驳船连接装置处垂向加速度,并对结果进行分析。     

166客位玻璃钢高速客船的研制

详细介绍了166客位玻璃钢高速客船的研制情况,重点探讨了该船关键技术:船型及船舶主尺度的选取;线型、船体材料的选用;船体结构的优化设计以及主要机电设备的配置。同时,给出了实船的测试结果。     

Some analytical results for the initial phase of bottom slamming

The deformation of boat hull bottom panels during the initial phase of slamming is studied analytically using a linear elastic Euler–Bernoulli beam as a representation of the cross section of a bottom panel. The slamming pressure is modeled as a high-intensity peak followed by a lower constant pressure, traveling at constant speed along the beam. The problem is solved using a Fourier sine integral transformation in space and a Laplace–Carson integral transformation in time. Deflection and bending moment as functions of time and position for different speeds, bending stiffnesses, etc. are given. In particular the effect of slamming load traveling speed on structural response of the simplified bottom structure is investigated. It is found that rather large deflections and bending moments are encountered at certain speeds of the pressure, which suggests that bottom panels may benefit from tailoring their stiffness and mass properties such that loads are reduced. This would vary with boat particulars and operation (deadrise angle, mass, speed, sea state, etc). The importance of the high-intensity pressure peak often encountered during slamming is also studied. It is seen that for relatively slow moving slamming loads the pressure peak has little influence. However, for faster moving loads its influence can be significant.     

基于重新建模法的滑行艇阻力数值计算

针对采用重叠网格法对滑行艇阻力数值计算时,采用不同子域的方式会增加网格数量,且在2套网格交接位置通过插值实现数据交换会引入额外的误差,从而导致计算精度和计算效率不高的问题,引入动态边界实现的网格方法,即重新建模法。借助计算流体动力学(CFD)软件STARCCM+,分别采用2种网格方法对一模型尺度滑行艇进行数值模拟,通过对试验结果进行对比和不确定度分析,对数值方法进行确认和验证。在此基础上,采用重叠网格方法和重新建模法对不同航速滑行艇进行绕流场数值模拟。并进行阻力和航态数值结果对比。结果表明,与重叠网格方法相比,重新建模方法的计算精度和计算效率均所有提高。     

新型消防船舶动力系统及对外消防系统的配置应用分析

为完成新型消防船海山号设计中船舶动力系统和对外消防系统的配置选型,对比分析独立柴油机驱动消防泵和主机驱动消防泵这两种配置方案的优劣,认为独立柴油机驱动消防泵的配置方式在消防方式、可靠性和经济性等方面占优,综合性能更好,实船试航结果与理论分析基本相符。     

运河漕舫的振动测试与减振降噪分析

针对京杭运河航段运河漕舫的船体振动进行测试，并对位移的测量信号进行功率谱分析、傅里叶分析和频率时间幅值瀑布图分析，还对船舶噪声进行测量，利用测试结果分析船体振动的原因，并提出了减振降噪措施。经过对局部结构的改造，船体振动有了较为明显的减弱。     

ZS-800型水面清漂船的开发设计

为解决航道堵塞、水质污染等问题研制开发ZS-800型水面清漂船,分析清漂船的性能特点,实船测试表明清漂船机械作业生产效率与人工清漂打捞效率相比有显著提高,可大幅降低生产成本。