浅谈船舶如何顺利通过外部机构的检查

介绍了外部机构检查的特点,提出了船舶顺利通过外部机构检查应采取的措施和做法。     

船舶舱室布置方案的模糊综合评价

在建立某型船指挥舱室布置方案评价因素集的基础上,用层次分析法确定了各因素的权重系数,采用语言值标尺及基于重心的方法构造模糊评价矩阵,最后用广义空间距离方法进行方案的比较与排序,完成某型船指挥舱室布置方案的模糊综合评价．     

The passenger vessel services act and America's cruise tourism industry

The Passenger Vessel Services Act (PVSA) of 1886, a cabotage law, attempts to shield U.S. maritime shipping from foreign competition. It also applies to the U.S. cruise ship industry. The PVSA requires foreign cruise ships that carry passengers between U.S. ports to also stop at foreign ports. Norwegian Cruise Line America (NCLA), which operates one U.S. flagged cruise ship in Hawaii, wants the U.S. Customs and Border Protection to require foreign cruise ships offering Hawaii itineraries from the U.S. west coast to spend more time in foreign ports. We analyze the merits of NCLA's proposal. We argue that rather than making the PVSA even more protectionist, the law should be repealed.     

同一水域两起船舶碰撞事故引发的思考

广州港沙角水域发生了两起大型拖带船组碰撞锚泊船的事故，其发生的时间、地点、性质有惊人的相似之处，本文从两起事故的共同点出发进行了详尽的原因分析，并提出了在狭窄水道进行大型拖航时应采取的安全措施。     

稳心高分布对集装箱船总体性能影响研究

以某支线型集装箱船为依托,针对主尺度和主要船型系数相同,稳心高分布不同的两版型线,分别对对应方案的破舱稳性、装载性能、快速性等总体性能进行评估,并对结果进行研究和分析,进而揭示了稳心高分布对集装箱船总体性能影响的一般规律,为设计者合理优化船型稳心高分布以及市场选择合理的船型方案提供了参考和建议。     

气垫船用复合材料空气导管结构布局和优化设计

根据空气导管的结构特点,考虑复合材料设计和制造一体化的特性,结合复合材料结构力学基本原理,提出一种可行的气垫船（Air-Cushion Vessel,ACV）用复合材料空气导管结构布局和优化设计方案。基于多约束目标优化对空气导管、内部加强结构的构型及尺寸等进行总体布局设计和优化,并利用有限元分析方法对导管结构进行极限过载的等效分析。计算结果表明,该复合材料空气导管结构在极限过载工况条件下可保持正常运行,满足结构整体的强度和刚度要求。     

基于多处理机的船舶动力定位控制系统

该文介绍了船舶动力定位控制的设计方法，研究了动力定位系统的分布式多处理机体系结构，提出了动力定位应用软件的层次化结构设计思想，基于多处理机的系统设计方案合理，并行度高，实时性好，可靠性高，可以很好的完成复杂船舶动力定位系统所要求的实时信息采集，数据处理，控制计算，推力分配，能源管理等任务，具有重要的工程实用价值。     

一种面向海事分支机构的船舶安全管理信息系统的设计

针对直属海事局分支机构船舶安全管理业务的需求，提出一种船舶安全管理信息系统的设计思路。该系统将电子海图平台、船舶交通动态数据和船舶安全管理信息集成，以实现船舶安全管理数字化、信息化、网络化。从系统技术实现角度，对信息管理系统作出详细的设计与分析。     

同步定位卫星通信系统在海上船舶监控中的应用

同步定位卫星通信系统是集精确定位与短文字通信于一体．为海上船舶监控管理提供一个平台。为减小海上船舶海损事故的发生，提高船舶监管能力，探讨基于同步定位卫星通信系统的船舶监控管理系统的特点，以对海上船舶进行监控管理、遇险救助等。     

Experimental investigation on vortex-induced force of a Steel Catenary Riser under in-plane vessel motion

A method to identify vortex-induced forces and coefficients from measured strains of a Steel Catenary Riser (SCR) undergoing vessel motion-induced Vortex-induced Vibration (VIV) is proposed. Euler–Bernoulli beam vibration equations with time-varying tension is adopted to describe the out-of-plane VIV responses. Vortex-induced forces are reconstructed via inverse analysis method, and the Forgetting Factor Least Squares (FF-LS) method is employed to identify time-varying vortex-induced force coefficients, including excitation coefficients and added mass coefficients. The method is verified via a finite element analysis procedure in commercial software Orcaflex. The time-varying excitation coefficients and added mass coefficients of an SCR undergoing vessel motion-induced VIV are investigated. Results show that vessel motion-induced VIV is excited at the middle or lower part of the SCR and in the acceleration period of in-plane velocity, where most of the excitation coefficients are positive, while during the deceleration period, the excitation coefficients becomes too small to excite VIVs. Parameter γ [1] has strong correlation with excitation coefficients. In addition, time-varying tensions contribute significantly to the variations of added mass coefficients under the condition that the ratio of dynamic top tension to pretension exceeds the range of 0.7–1.3. Moreover, chaotic behaviors are observed in vortex-induced force coefficients and are more evident with the increase of vessel motion velocity. This behavior may attribute to the randomness existing in in-plane velocity and its coupling with out-of-plane vibrations.