新型收放式减摇鳍阀控液压系统的设计理念

近年来随着国内对收放式小面积减摇鳍的需求增加,上海衡拓实业发展有限公司设计了一种鳍面积较小的后收式收放式减摇鳍,并配备了一种新型收放式减摇鳍阀控液压系统,这种系统具有设计参数选择合理,效率高,抗污染性强和冷却效果佳等特点,经实船使用以后情况良好,完全符合技术要求。文章通过对新型收放式减摇鳍阀控液压系统设计思想的介绍和实践验证,证明这种收放式减摇鳍阀控液压系统设计是合理和有效的。     

重新认识收放式减摇鳍装置

通过新老收放式减摇鳍装置在结构和技术性能上的比较分析，论证了研究开发新型收放式减摇鳍装置的可能性。     

全航速收放式减摇鳍装置零件有限元分析

收放式全航速减摇鳍已经逐渐成为收放式减摇鳍中的主流产品,全航速功能将作为其标准功能而存在。然而,部分零部件复杂的受力情况或复杂的构造外形,使得设计计算及验证就成为了其主要技术难点之一。文章主要应用有限元分析软件对收放式全航速减摇鳍装置上的典型零部件进行了有限元分析,以作为其可靠性验证的来源。     

非收放式减摇鳍鳍轴校核算法研究

非收放式减摇鳍作为减摇鳍产品中非常重要的一个组成部分,而鳍轴也是其减摇力矩传力链中非常重要的一环,对于鳍轴综合应力的校核也就成了非收放式减摇鳍设计中的关键。通过比较考虑剪力的新算法以及仅做弯扭综合应力校核的2种算法,及它们在不同强度理论下的状态,综合讨论得出能使鳍轴应力值更加精确的算法。     

收放式减摇鳍执行机构的改进设计

介绍了收放式减摇鳍的工作原理、结构组成及部分执行机构的改进设计。     

减摇鳍装置执行机构的发展与探索

介绍收放式和非收放式减摇鳍装置的执行机构的基本组成及其大致的演变情况。对这两种机构的设计与运行中的一些技术问题作了阐述,并提出了改进设计的思路和方向。     

JQ-8型减摇鳍装置放鳍故障实例

正0引言减摇鳍装置可以在船舶大风浪航行时减小船横摇角,提高船舶适航性,为船上的其他仪器设备提供良好的工作环境,并且能够改善船员的工作、生活条件。对于收放式减摇鳍,首先必须确保各鳍能顺利从鳍箱放出,才能使其对船舶产生减摇作用。某船JQ-8型减摇鳍装置在某次机旁放鳍时,当按下"机组启动"后减摇鳍电机油泵运行正常,按下"系统工作"按钮进入放鳍程序后减摇鳍收放缸活     

可收放式减摇鳍装置模块化制造与安装工艺研究

模块化建造是现代造船模式中一项先进的造船技术。文中介绍某型船可收放式减摇鳍装置的模块化设计、制造与安装工艺研究,验证减摇鳍装置的模块化制造方法具有可行性和可靠性,可为同类型设备安装提供借签。     

回转体与销轴联接方式对应力值影响的分析

简要分析了收放式减摇鳍装置执行机构中,回转体推力臂和销轴在不同联接方式时,形成的局部应力情况,并就此进行了对比.     

非收放式摇鳍装置在巡视船上的安装

本文简要介绍了非收放式减摇鳍在巡视船上的安装工艺过程,并结合安装中碰到的具体问题,对安装的重点及难点进行分析和总结。     

减摇鳍阀控液压系统模型的建立

面对各种各样减摇鳍液压系统，运用传统的按设计手册设计减摇鳍液压系统的方法，已不能满足当前设计周期短、系统参数优化的要求．本文论述了通过对减摇鳍阀控液压系统的数学建模，运用MATALAB分析手段，获得优化的系统参数，为设计出经济合算性能优良的减摇鳍液压系统提供了保证．     

中国渔政116船减摇鳍的安装

介绍了在改造船上通过合理的工艺精确安装减摇鳍的方法,安装结果表明,在改造船上采取合理焊接工艺,控制焊接顺序,可以保证结构件安装精度．     

CMAC与PID的复合控制在减摇鳍中的应用

提出了CMAC与PID复合控制的算法,并以此用于船舶非线性横摇减摇鳍中。以PID控制为反馈控制来保证控制系统的稳定性且抑制扰动,以CMAC为前馈补偿控制器实现系统的逆动态模型来确保系统的控制精度和响应速度。为了提高CMAC神经网络实时在线学习的快速性和准确性,采用了基于信度分配的CA-CMAC-AMS学习算法。其仿真结果与传统的数字PID控制相比较,表明了该复合控制提高了减摇鳍控制系统的减摇效果,并具有较强的抗干扰能力和鲁棒性。     

Research on roll stabilization for ships at anchor

With the increasing importance of ocean exploitation, providing anti-rolling stability for ships at anchor has become more and more important. The lift-generation theory of traditional fin stabilizers is based on incoming flow velocity, which is not suitable for explaining lift generated at anchor. We analyzed non-steady flows, with forces on fin stabilizers generated by non-incoming flow velocity conditions, and gave a new lift-generation model. The correctness of the model was proven by comparing experimental results of fin stabilizer motion under non-incoming velocity conditions from the fluid computation software with that from the emulator of the lift-generation model. Finally, the model was used in an anti-rolling system on a ship and the reduction of roll was much better than what could be achieved by passive anti-rolling tanks.     

减摇鳍一种新型"航速调节"途径的实现

介绍了用西门子S7-200 PLC接收计程仪或 GPS的TTL电平的NMEA0183格式信号,实现了减摇鳍的“航速调节”。     

零航速减摇鳍鳍型参数估算方法

零航速减摇鳍具有双重工作模式,不同生力机理使其流体动力特性存在本质差异,从而导致二者对鳍型参数要求截然不同,为满足零航速模式需求,零航速减摇鳍大多选用小展弦比鳍型,但亦给常规减摇模式带来诸多不利影响.通过分析展弦比、翼梢形状等因素,从双模式对鳍型参数的实际要求出发,应用线性系统理论、对抗控制原理,提出适用于零航速减摇鳍的尺寸参数估算及综合评定方法,得出不可收放式零航速减摇鳍的最佳展弦比范围,为工程化设计提供了必要的理论依据.     

浅水中半小水线面双体船概念设计的阻力分析（英文）

Resistance analysis is an important analytical method used to evaluate the hydrodynamic performance of High Speed Craft(HSC). Analysis of multihull resistance in shallow water is essential to the performance evaluation of any type of HSC. Ships operating in shallow water experience increases in resistance because of changes in pressure distribution and wave pattern. In this paper, the shallow water performance of an HSC design concept, the semi-Small Waterplane Area Twin Hull(semi-SWATH) form, is studied. The hull is installed with fin stabilizers to reduce dynamic motion effects, and the resistance components of the hull, hull trim condition, and maximum wave amplitude around the hull are determined via calm water resistance tests in shallow water. These criteria are important in analyzing semi-SWATH resistance in shallow water and its relation to flow around hull. The fore fin angle is fixed to zero degrees, while the aft fin angle is varied to 0o, 5o, 10o, and 15o. For each configuration, investigations are conducted with depth Froude numbers(Fr H) ranging from 0.65 to 1.2, and the resistance tests are performed in shallow water at the towing tank of UTM. Analysis results indicate that the resistance, wave pattern, and trim of the semi-SWATH hull form are affected by the fin angle. The resistance is amplified whereas the trim and sinkage are reduced as the fin angle increases. Increases in fin angle contribute to seakeeping and stability but affect the hull resistance of HSCs.     

鳍与舭龙骨的水动力干扰

在水平循环水槽中进行了鳍与舭龙骨定常升力干扰的平板试验，给出了试验结果，并建议采用剩余升力系数的概念来评估舭龙骨的整流作用，据此确定舭龙骨的合理尺度和布置。     

Resistance analysis of a semi-SWATH design concept in shallow water

Resistance analysis is an important analytical method used to evaluate the hydrodynamic performance of High Speed Craft (HSC). Analysis of multihull resistance in shallow water is essential to the performance evaluation of any type of HSC. Ships operating in shallow water experience increases in resistance because of changes in pressure distribution and wave pattern. In this paper, the shallow water performance of an HSC design concept, the semi-Small Waterplane Area Twin Hull (semi-SWATH) form, is studied. The hull is installed with fin stabilizers to reduce dynamic motion effects, and the resistance components of the hull, hull trim condition, and maximum wave amplitude around the hull are determined via calm water resistance tests in shallow water. These criteria are important in analyzing semi-SWATH resistance in shallow water and its relation to flow around hull. The fore fin angle is fixed to zero degrees, while the aft fin angle is varied to 0°, 5°, 10°, and 15°. For each configuration, investigations are conducted with depth Froude numbers (Fr _H ) ranging from 0.65 to 1.2, and the resistance tests are performed in shallow water at the towing tank of UTM. Analysis results indicate that the resistance, wave pattern, and trim of the semi-SWATH hull form are affected by the fin angle. The resistance is amplified whereas the trim and sinkage are reduced as the fin angle increases. Increases in fin angle contribute to seakeeping and stability but affect the hull resistance of HSCs.     

减摇鳍升力反馈与鳍角反馈控制的对比

该文对照减摇鳍鳍角反馈控制系统，分析了升力反馈控制系统的原理与构成，由于升力反馈控制系统避开了鳍角到升力的不确定性，不需用鳍用到波倾角的转换系数Ka，不用航速调节，浪级调节的不同作用，故此控制具有系统结构简单可行，鲁棒性好及减摇效果高的优点。