远洋金枪鱼延绳钓渔船总布置探讨

阐述远洋金枪鱼延绳钓渔船总布置的基本原则及其特征,根据远洋金枪鱼延绳钓渔船渔捞作业的特点,介绍渔捞设备布置形式和作业流程.     

金枪鱼围网船围网设备及系统的研究与应用

为了满足国家"提高船舶自主创新能力","发展远洋渔业和海上贮藏加工技术与设备","重点研究开发大型远洋渔业船舶"的发展规划,完成国家863项目目标,根据金枪鱼的习性特点,借鉴国际上已有的金枪鱼围网船,开发出符合中国国情、具有自主知识产权的大型金枪鱼围网渔船。同时完成了捕捞设备的研究与应用,填补了国内在此领域的空白。本文详细介绍了围网作业流程,围网设备及系统的形式、布置、性能参数、控制方式及在围网作业中的作用。     

远洋金枪鱼渔船动力装置探讨

本文结合３００总纯远洋金枪鱼延绳钓渔船动力装置设计，对诸如航行作业工况，推进装置型式、柴油机型式、捕捞机械型式和制冷型式等问题进行了分析讨论，并提出了远洋金枪鱼延绳渔船动力装置的合理方案。     

南海灯光围网渔船改装设计

将一艘南海远洋拖网渔船改装设计为钢质灯光围网渔船,从总布置和型线入手进行改造,对改型后的船舶静水力和完整稳性进行计算分析,提出改进围网渔船稳性的建议。     

远洋金枪鱼围网渔船主要参数分析

本文在收集大量大型远洋金枪鱼围网渔船实船资料的基础上，对其主要参数进行了分析研究，得出一些近拟公式。它们既可用于初步设计工作１，也可作为船型论证的基础。     

围网渔船绞网装置的方案设计

远洋围网渔船围网绞机和动力滑轮装备现状,远洋围网渔船绞网装置的方案设计,经过多次试验和改进的围网绞机和动力滑轮装置已基本达到设计要求,将安全保护装置设计到控制系统中,将是一个比较理想的选择。     

基于有限元法的金枪鱼围网渔船主桅强度分析

针对金枪鱼围网渔船的实际作业工况,采用有限元方法分析了主桅及其附近甲板结构的强度,并依据CCS规范进行强度校核.结合分析结果,提出改进和优化措施,为主桅及其附近甲板结构设计提供了参考.分析表明,主桅及其附近甲板结构整体上满足强度要求;优化后的主桅结构可减重约1.2t,有助于提高整船的稳性。     

网员名录

公司创办于1907年,现隶属中国水产集团总 公司。拥有7千吨级船台,1千吨级水坞和1千米 延长停泊码头及相应配套设施。二十多年来,共 为国内外建造各类渔船400余艘,并完全配套公司 生产的各种系列产品。目前,公司正在加紧研制 储备7000吨级以下的散装货船、各种海河专用工 作船、金枪鱼围网船和更适合远洋捕捞作业的新 型渔轮等。公司已经获得ISO9001质量体系认证 证书,各种渔轮遍布世界各地,受到各大公司和 沿海渔民的交口赞誉。     

围网渔船主桅结构强度直接计算方法研究

美式围网渔船在渔捞作业时,主、辅吊杆受到了力最终传递到桅杆上,桅杆和船体支撑结构受到较大的载荷,受稳性影响,桅杆构件不能过大,考虑桅杆和船体支撑结构的局部强度对安全影响较大.文中采用有限元软件MSC.Patran/MSC.Nastran对桅杆和船体支撑结构的局部强度进行直接计算,并将计算结果与许用应力值进行比较,证明构件强度满足使用要求,此方法适用于围网渔船桅杆和船体支撑结构的局部强度的校核.     

金枪鱼围网渔船技术经济分析

对金枪鱼围网渔船作了技术经济分析,指出金价与资源情况对金枪鱼围网渔船的净现值（ＮＰＶ）有着较大的影响,燃油价与渔港至渔场的距离对ＮＰＶ只有中等程度的影响,停港天数及造价系数对ＮＰＶ的影响不大;同时围网渔船相对于每种鱼价,每种资源情况及每种渔港至渔场的距离都有一最佳船型区。     

Trophic flows,ecosystem structure and fishing impacts in the South Catalan Sea,Northwestern Mediterranean

An exploited ecosystem from the continental shelf and upper slope of the Northwestern Mediterranean Sea was described by means of an Ecopath mass-balance model with the aim of characterising its functioning and structure and describing the ecosystem impacts of fishing. This application included some complexities added to the general modelling methodology due to the high biodiversity of the Mediterranean Sea and the multispecific nature of the fishery, and to the difficulties of working with fishing data which are usually irregularly or imprecisely collected. The model comprised 40 functional groups including primary producers, the main species of benthic, demersal and pelagic invertebrates, fishes and non-fish vertebrates and three detritus groups. In addition, trawling, purse seine, longline and troll bait fishing fleets were included.Results showed that the functional groups were organized into four trophic levels with the highest levels corresponding to anglerfish, dolphins, large pelagic fishes and adult hake. The system was dominated by the pelagic fraction, where sardine and anchovy prevailed in terms of fish biomasses and catches. Detritus and detritivorous groups also played key roles in the ecosystem and important coupled pelagic-demersal interactions were described. Considering Odum's theory of ecosystem development, the ecosystem was placed on an intermediate-low developmental stage due, at least partially, to the impact of fishing activity. This highlighted the high intensity of fishing in the ecosystem, in accordance with the general assessment of western Mediterranean marine resources, and fishing fleets were ranked as top predators of the system. The low trophic level of the catch was in line with the long history of exploitation in the area. However, the steady decline of pelagic landings between 1994 and 2003, coupled with a decrease of the pelagic biomass within the system, underlined the low resistance of the system in front of perturbations. This decline was reproduced under Ecosim dynamic simulations combining different scenarios of moderate increase of fishing effort and an environmental forcing affecting the availability of preys to small and medium-sized pelagic fishes under wasp-waist flow control.     

一种水下网具钢丝绳切割装置的设计

针对长江口长期存在的大量非法定置网捕捞问题,依托渔业执法船,文章研究了一种操作方便、高效便捷、安全的小型化定置网网具取缔装置,并在海上试验中取得了非常理想的效果。通过钢丝绳剪切器能够快速准确地破坏非法网具钢丝绳,并且具有使用方便、安全可靠等特点,特别适合近海的执法活动。研究结果为近海的非法网具清理装备以及环境保护提供了研究依据和基础。     

Effect of freeboard and metacentric height on capsizing probability of purse seiners in irregular beam seas

The probability of capsize of purse seiners in irregular beam seas and the effect of freeboard height and metacentric height on trapped water on the deck was investigated. The aim was to quantify a safety level that can be achieved by direct stability assessment for this type of fishing vessel. The amount of trapped water on deck was numerically estimated using a hydraulic flow assumption. The long-term capsizing probabilities were estimated using a piecewise linear approach together with wave statistics from major Japanese fishing areas. The estimated safety level of capsizing probability was compared with that obtained by the IMO weather criterion and by the water-on-deck criterion of the IMO Torremolinos Convention. Numerical results for four typical Japanese purse seiners indicated that the effect of freeboard, on the amount of trapped water on deck, is more important than that of the metacentric height. Besides the metacentric height and the freeboard, it was shown that the danger of capsizing is a function of the rise of floor. The safety level obtained by the capsizing probability approach is generally higher than that based on the IMO weather criterion. However, the water-on-deck criterion provides a higher safety level than the capsizing probability approach for ships with a low rise of floor.     

金枪鱼延绳钓船机电混合动力推进系统应用研究

作为一种新型推进方式,机电混合动力推进系统具有调速范围广、驱动力大、正反转易控、体积小、布局灵活、安装维修方便、振动和噪音小等优点。金枪鱼延绳钓船正常航行与作业航行时的航速不同,高航速航行时,使用柴油机推进系统;低航速钓鱼作业时,使用电力推进系统,柴电推进系统相互切换,相互联锁。经过实船测试,机电混合动力推进系统比柴油机推进省油约25%;前者可以提高金枪鱼船推进系统冗余度,提高船舶放钓、收钓作业工况下的操纵灵活性,大幅度提高船舶操纵性和综合推进效率,提高了船舶经济性与环保节能性,具有广阔的应用推广前景。     

仿金枪鱼水下机器人摆动-滑行游动数值研究

为探讨摆动-滑行方式的游动机理,本文基于RANS求解器和区域网格整体动态运动技术,建立了仿金枪鱼水下机器人摆动-滑行的自主游动计算模型,数值模拟其从某一速度自由加速到速度值稳定波动状态,分析了游动稳定时速度、水动力、尾涡等的变化特点,并比较了不同滑行时间的影响。计算结果表明:摆动滑行时间相同时,机器人的速度均值比正常游动下降了30%,但波动幅值为后者的3倍;水动力的大幅快速变化导致摆动阶段游动效率下降,但在滑行阶段利用了滑行惯性和尾流区的脱落涡吸收能量。随滑行比增大,游动速度均值下降,但速度功率比却逐渐上升。所计算工况下,滑行比不小于0.6时,摆动-滑行游动比正常游动更节省能量。     

莫桑比克贝拉渔码头重建工程工艺设计研究

以莫桑比克贝拉渔码头重建工程为例,探讨渔船装卸、水产品加工处理及冷藏、制冰及输冰等工艺设计内容,为类似渔码头设计提供借鉴。