基于载人潜水器的深海敷缆运动仿真

提出了基于载人潜水器搭载海底敷缆装置的深海敷缆作业方式，建立了载人潜水器深海敷缆运动的二维稳态模型，仿真分析了余量敷缆时不同航行速度和放缆速度组合、潜水器相对海流速度、敷设余量、航行高度和海缆重量等参数对敷缆运动的影响。分析发现海缆张力随着敷设速度、潜水器相对海流速度、海缆重量的增大而增大，随着敷设余量的增大而减小；海缆水中位形曲线随着敷设速度、潜水器相对海流速度增大而趋于平缓，随着海缆重量的增大而更加陡峭，放缆速度的变化则对海缆位形曲线无影响；潜水器航行高度的变化对缆形和张力分布都没有影响，只是随着高度的增加，缆形和张力在原来的高度基础上有一定的延伸。     

拖船操纵运动与水下拖曳列阵的耦合运动分析

建立了拖船操纵运动与水下拖曳列阵的三维非线性数学模型,求解了在脐带非线性缆力作用下的运动方程,模拟了拖曳系统在几种典型状态下其缆索的形态变化,以及列阵张力变化。     

"海龙-3500"深海潜水器的变长缆运动建模与仿真

仿真并分析了“海龙-3500”深海潜水器(ROV)出中继器后的运动过程。考虑海流的影响,ROV的建模采用通用的动力学模型,轻缆的建模采用凝聚参数法。结果表明,设定的放缆方案是合理的,可作实际操作参考。提供的缆和ROV系统的仿真算法,可用作实际操作前的模拟计算。     

带缆遥控潜水器系统分析简介

介绍了水下机器人的种类、动扰动下保持其稳定平衡的力学本质、脐带电缆的作用，以及它对潜水器的干扰力的计算方法。文中还对准静态法和凝集参数法计算缆力进行了比较，分析了各自的特点。     

深水吊缆非线性垂向运动响应分析

针对深水吊装过程中吊缆及吊载在外部扰动作用下的运动幅值较大,运动特性呈现较强的非线性问题,提出基于Hamilton原理求解吊缆非线性运动响应的方法,建立吊缆的非线性运动方程,采用有限差分方法进行求解,与文献的试验值比较,结果吻合较好,验证求解方法的准确性和可靠性。以4 500 m缆长为例,对不同吊缆上端激励周期下吊缆不同位置处的缆张力、垂向位移进行计算分析,结果表明,当吊缆长度较大时,缆张力及吊缆垂向位移在整个吊缆内不是均匀分布的,缆张力及垂向位移的传播呈现明显的波动现象,且随着吊缆长度和上端激励周期的增加,波动的幅值及变化剧烈程度逐渐减小。     

基于弹性波理论的深水吊缆非线性运动研究

针对深水吊缆非线性运动特性,基于弹性波理论建立了吊缆的动态模型,推导出吊缆的非线性运动方程,采用有限差分方法进行求解,与文献的试验值比较,结果吻合较好,验证了求解方法的准确性和可靠性;以谐波运动作为初始激励,计算不同水深时的吊载垂向运动响应并进行频谱分析,结果表明吊载的垂向运动响应时历为明显的非线性运动;同时给出了缆长4 500 m和3 000 m吊载处的垂向位移的计算结果,发现随着激励周期增加,3 000 m时吊载处的垂向位移幅值要大于4 500 m,且相差程度越来越大。     

中国南海波浪作用下悬浮隧道运动响应研究

通过采用光滑粒子法求解弱可压流体运动方程，建立波浪-悬浮隧道-系泊系统全耦合时域分析模型，研究波浪对悬浮隧道耦合作用下的动力响应。基于中国南海实测海洋环境数据，对波浪作用下悬浮隧道的整体受力、运动响应及系泊受力进行研究。结果表明：受雷诺数影响，隧道受到的波浪力与波浪强度呈非线性关系；系泊缆与海床夹角越小，隧道的纵摇幅值越小；当角度为45°时，隧道运动性能及系泊缆受力能够达到较好的平衡状态。研究结果能为悬浮隧道选型及系泊系统设计提供参考。     

浮式生产储油装置系泊系统计算分析

系泊系统是FPSO设备的重要组成部分,应用三维势流理论、时域非线性有限元法模拟系泊缆索动力特性,以挪威船级社(DNV)的SESAM程序作为主要工具,对单点分组系泊形式下的FPSO运动响应及系泊力问题进行研究.给出了FPSO六个自由度的运动情况和导缆孔处张力结果,得出作用在FPSO上的波浪漂移力与一阶波浪激振力在同一个数量级都比较大.     

泊位长度与系缆方式对系泊船舶的影响

泊位长度与系缆方式影响系泊船舶的运动量和系缆力,泊位长度确定和系缆方式选择是大型开敞式码头设计中的一个重要课题。以17.2万m~3LNG船为研究对象,通过物理模型试验,研究风、浪、流共同作用下系泊船舶的运动量和系缆力,分析泊位长度与系缆方式对系泊船舶的影响,研究结果表明:较短的泊位长度对横向运动、缆力大小以及缆力间的均匀性有一定的改善;在横风横浪作用下,短泊位时横缆分开布置对船舶运动有较好的约束,能减小艏艉缆及倒缆的受力,而在泊位较长时,横缆应集中布置,避免横缆长度不一,较短的横缆承担较大的作用力。     

系泊缆等效水深截断点处动力响应

考虑海洋平台悬链线式系泊缆的非线性特性,采用集中质量法建立系泊缆的运动方程,分别应用时域和频域分析方法研究系泊缆上若干节点的动力响应。分析上端点运动为正弦波动和随机波动2种情况对应的系泊缆有代表性节点的动力响应。获得了系泊缆不同位置的等效水深截断点处的动力响应与上端点的对应规律,为进一步研究主动式混合模型试验方法提供了技术支持。     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

正~~     

33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to:·meet and present advances in technology and its scientific support;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

桥梁防撞设施物理模型试验

物理模型试验是预报防撞设施所受撞击力及优化设计方案的主要方法之一。结合杭州湾大桥柔性防撞设施及东海大桥独立式防撞体设计方案,阐述了船—防撞体撞击试验的基本原理、方法、试验方案及相关试验结果。提出了柔性防撞系统的优化方案。试验结果表明,该方案经济有效,可供预报类似桥梁防撞设施撞击力时参考。     

印尼某电厂码头水工建筑物设计

印尼某电厂项目码头水工建筑物包括码头、防波堤和护岸等主要组成部分。在该项目水工建筑物的设计过程中,综合考虑当地的自然条件、施工能力和材料来源等因素,不断优化结构选型和结构断面。根据不同使用要求,护岸分别采用直立式和斜坡式2种结构型式,推荐的设计方案节省投资、施工方便,可供同类工程设计参考。     

Catalyzing Coastal Management in Kenya and Zanzibar: Building Capacity and Commitment

Site-based projects were initiated in Chawka Bay-Paje, Zanzibar, and Nyali-Bamburi-Shanzu, Kenya, to demonstrate the benefits of an integrated coastal management (ICM) approach for addressing coastal issues such as tourism development and enhancement of resource-dependent village economies in eastern Africa. A two-year, multidonor project used three primary strategies to make rapid, but sustainable, progress toward ICM. These included using interagency government teams for ICM planning, adopting an internationally recognized framework for ICM as a project ''road map,'' and explicitly incorporating capacity-building strategies into all aspects of the project. Within two years, integrated ICM action strategies, prepared through participatory processes, were being implemented at both sites, and both teams were working to expand the scale and scope of ICM in their nation. More importantly, the project helped create committed, capable, interagency groups that continue to work together to address urgent ICM issues.