冰盖下两层流体水波与可渗透起伏海床的作用(英文)

The scattering problem involving water waves by small undulation on the porous ocean-bed in a two-layer fluid,is investigated within the framework of the two-dimensional linear water wave theory where the upper layer is covered by a thin uniform sheet of ice modeled as a thin elastic plate.In such a two-layer fluid there exist waves with two different modes,one with a lower wave number propagate along the ice-cover whilst those with a higher wave number propagate along the interface.An incident wave of a particular wave number gets reflected and transmitted over the bottom undulation into waves of both modes.Perturbation analysis in conjunction with the Fourier transform technique is used to derive the first-order corrections of reflection and transmission coefficients for both the modes due to incident waves of two different modes.One special type of bottom topography is considered as an example to evaluate the related coefficients in detail.These coefficients are depicted in graphical forms to demonstrate the transformation of wave energy between the two modes and also to illustrate the effects of the ice sheet and the porosity of the undulating bed.     

厦门港叫板高雄港

近年来，受各种因素的影响，海峡东岸高雄港的国际集装箱中转港和世界大港地位受到挑战，尤其是来自西岸厦门港的威胁。本文从高雄和厦门两港的地理位置出发，对两港的港航条件、外部环境和吞吐量格局进行了比较分析。     

海一鸥游艇公司携日本洋马公司共拓中国市场

海一鸥游艇有限公司是代理销售国外知名船艇并提供相关服务及设施的专营公司.海一鸥游艇有限公司注册于上海,分别在北京、大连、青岛、深圳设有分公司,在广州设有分销商.     

2007IEEE机电一体化与自动化国际会议开幕

由国家自然科学基金、王宽诚基金、美国电气电子工程师学会(IEEE)和日本香川大学等资助,哈尔滨工程大学承办的"2007IEEE机电一体化及自动化国际会议"8月6日在哈尔滨市香格里拉饭店开幕.来自中、美、日、韩、加等27个国家和地区的500余名代表出席会议,其中有近200名国外代表,国防科工委副主任金壮龙,黑龙江省委常委、省科技厅厅长孙尧出席大会并致辞.会议共收到来自33个国家和地区的投稿论文1861篇.经过国内外专家的严格审阅和定稿,最终录用701篇,采用率不到37%.     

以科学发展观为指导打造长江黄金水道

学习贯彻十七大精神，对于动员拿党全国各族人民，存以胡锦涛同忠为总书记的党中央坚强领导下，高举中国特色社会主义伟大旗帜，奋力夺取全面建没小埭社会新胜利、圩创中国特色礼会主义事业新局而，具有重大现实意义和深远历史意义。长汀航道各级党组织要把组织学习和贯彻落实十七大精神作为当前和今后一个时期的首要政治任务，迅速把干部职工的思想和行动统一到全会精神上来，     

散货集装箱化的成因及发展趋势

0引言近年来全球集装箱运量的年增长率基本维持在10%以上,据初步统计2007年全球集装箱运量达1.3亿TEU,港口吞吐量达4.7亿TEU。随着集装箱制造、装卸工艺的改进,适箱货物的范围也在不断扩大。20世纪90年代,美国就开始采用集装箱运     

打造民族知名品牌的三一港口机械——访三一港口机械公司彭国成总经理

<正>众所周知,三一重工股份有限公司是一家享有盛誉的上市公司,曾连续4年上榜中国最具价值品牌,是工程机械行业内的标志性企业之一。作为中国最具科研实力的工程机械制造商,三一重工拥有国家级技术中心、博士后工作站,并承接有国家863课题,取得专利400多项。三一重     

关于美国水域对船舶驱逐和控制的探讨

美国海岸警备队港口长官(COTP)或口岸当局(OCMI)对存在缺陷的船舶,根据缺陷的严重性,决定对这些船舶采取控制行动来保证船舶、港口和环境的安全,至于控制的程度、范围以及当局的执行力则和这些缺陷的本性一致.     

FPSO global strength and hull optimization

Global strength is a significant item for floatingproduction storage and offloading （FPSO） design, and steel weightplays an important role in the building costs of FPSO. It is the maintask to consider and combine these two aspects by optimizing hulldimensions. There are many optional methods for the globalstrength analysis. A common method is to use the ABS FPSOEagle software to analyze the global strength including the rulecheck and direct strength analysis. And the same method can beadopted for the FPSO hull optimization by changing the depth.After calculation and optimization, the results are compared andanalyzed. The results can be used as a reference for the futuredesign or quotation purpose.     

深水起重铺管船横摇运动性能分析(英文)

For a large floating vessel in waves,radiation damping is not an accurate prediction of the degree of roll unlike other degrees of freedom motion.Therefore,to get the knowledge of roll motion performance of deepwater pipelay crane vessels and to keep the vessel working safety,the paper presents the relationship between a series of dimensionless roll damping coefficients and the roll response amplitude operator(RAO).By using two kinds of empirical data,the roll damping is estimated in the calculation flow.After getting the roll damping coefficient from the model test,a prediction of roll motion in regular waves is evaluated.According to the wave condition in the working region,short term statistics of roll motion are presented under different wave parameters.Moreover,the relationship between the maximal roll response level to peak spectral wave period and the roll damping coefficient is investigated.Results may provide some reference to design and improve this kind of vessel.     

滚装连接桥结构分析

对国内各种滚装连接桥的组成、桥体结构、龙门架结构、升降方式等进行分析比较 ,指出其优缺点和适应性 ,提出选型意见     

Bow door slamming of Ro/Ro ferries

This paper addresses the structural response of clam-type bow doors of Ro/Ro vessels under slamming loading conditions. The structural analysis is performed with the finite element code MSC/NASTRAN. The loading conditions were determined on the basis of towing tank tests, numerical calculation and regulations of classification societies. Slamming loads are applied statically and the FE code accounts for both material and geometrical nonlinearities. Apart from stress distributions, which are determined for different loading patterns, the results are used to calculate the forces and moments induced on the locking and securing elements, which secure the doors among themselves and the doors to the bow structure. The modelling methods reported may be used for the finite element analysis of similar structures. Such analyses of bow doors response under slamming loading could be submitted to classification societies for approval.     

6500 DWT集装箱滚装船滚装通道设计

6500 DWT集装箱滚装船具有强大的多元化适货能力和灵活高效的装卸能力,既有独立的封闭的车辆舱和集装箱货舱,亦有舱盖上的兼用装载区域,在滚装通道的设计过程中,该船较小的总体尺度与多功能装卸能力要求是设计难点的来源和根本原因.通过合理化布置艉斜跳板及滚装处所解决了设计难点.     

骑岸式滚装坡道初探

简述传统离岸式滚装坡道存在的缺点。提出了1种适潮区间大的骑岸式滚装坡道，并对其技术参数的确定进行了探讨。     

客滚船照明系统的研究

随着客滚船向着大型化、豪华化方面的发展,其建造安全要求也在不断提高,其中照明系统的设计和布置成为该类船型的一个重要特点,特别是应急照明系统的设计和应急照明灯具的布置越来越复杂,通过对规范和现有船型的分析,有助于设计者和建造者提高工作效率。     

11 000吨滚装船空调通风系统

介绍了11 000吨滚装船空调通风系统的设计概况,以及该船空调通风系统在利用能源和节约能源方面的独特优点.     

转危为安 渤海湾客滚运输的历史性跨越

1999年11月24日,“大舜”轮在渤海湾航行途中发生火灾后沉没,给国家和人民群众生命财产造成了重大损失,．渤海湾客滚运输安全与否,事关人民群众切身利益和经济社会发展稳定。十年后的今天,渤海湾客滚船的安全状况发生了翻天覆地的变化,客滚运输的安全形势不断好转,尤其是近6年来无一船沉没,无一人死亡,实现了渤海湾客滚运输由危转安的历史性跨越。     

浅谈我国进军世界新型滚装船建造市场

本文对滚装船的发展现状作了简要介绍,并对我国在承建出口滚装船应注意的问题作了简要的分析。     

滚装船货舱区域的CCTV系统设计

滚装船货舱区域,一般在车辆上下坡道处和尾门处安装摄像头,用于监控记录汽车的上下坡、上下船行驶情况.主要介绍滚装船货舱区域的CCTV系统设计方案,满足船级社的规范,同时节约成本.     

现代专用滚装汽车码头设计的启示

目前,我国专用汽车滚装码头的设计和建设经验仍显不足,国内设计规范尚未正式出台。通过对国外专用汽车滚装码头建设的考察总结提出设计应注意的一些问题。