Statistical properties of bulk carrier longitudinal strength

The paper focuses on time-variant longitudinal strength of bulk carriers under corrosion wastage, applying both Taylor series expansion method and Monte Carlo simulation. Hull girder section modulus and ultimate bending moment capacity are determined, by classical beam theory and the commonly applied incremental-iterative approach, respectively. Two main aspects are fully discussed and investigated, according to the final recommendations of last ISSC Report. The former regards the covariance between annual corrosion rates of individual structural members, commonly assumed as uncorrelated. Really, as it is conceivable that a certain correlation exists, three different cases are investigated: uncorrelated variables, fully correlated variables, full correlation between structural members belonging to the same category of compartments. The latter investigates the probability density function of both hull girder section modulus and ultimate bending capacity, because the Central Limit Theorem cannot be applied when correlation among random variables exists. Finally, as a test example, the bulk carrier section, presented in the last ISSC benchmark study, is analysed.     

VLCC翼桥振动分析及相关技术研究

分析了超大型油船（VLCC）翼桥产生振动的原因,运用有限元（FEM）静力学分析、模态分析和频域响应分析理论进行实船撞击和试航振动测量,通过理论与实际相结合,提出了综合解决船舶振动问题的方案。     

20.6万DWT散货船前期开发概述

介绍了20.6万DWT散货船前期开发情况。该船有较大的舱容和载重量,在保证较高航速的情况下仍具有良好的经济性。此类船型的开发重点为线型优化和空船质量控制。通过合理分舱,可以有效降低设计弯矩,有利于减轻空船质量。     

散货船货舱区主甲板电装生产设计研究

针对散货船货舱区主甲板的电缆敷设特点,设计一种罩壳式电缆托架敷设形式来代替目前正普遍使用的电缆管敷设形式,并探讨该形式的可行性和有效性.     

南海神庙：广州海上丝绸之路的重要载体

广州海上丝绸之路的重要遗迹有多处,但最具典型意义的是南海神庙．南海神庙的波罗庙之称谓;南海神庙中供奉的异邦人;南海神庙的历次修缮由负责海外贸易的官员主事,这些都说明其在中外交流史上的重要意义．     

关于国际货运代理企业扣留提单问题的探讨

最高人民法院新的司法解释《关于审理海上货运代理纠纷案件若干问题的规定》（以下简称“规定”）已于2012年5月1日起正式开始实施.该“规定”主要调整货运代理企业接受委托办理与海上货物运输有关的货运代理事务时与委托人之间形成的权利义务关系.在货运实践中,货运代理企业常常以拒绝交付提单等运输单证作为促使委托人支付相关费用的先决条件,产生了很多纠纷.在新的“规定”中对于货运代理企业扣留提单等单证问题,最高人民法院给予了新的解释,对国际货运代理企业的行为进行了重新的定义和规范.     

针对海淡水交替港口的火车滚装船压载水处理系统

针对某火车滚装船航线港口水质较差、泥沙较多且每年出现海淡水交替等特殊情况,选择电解式压载水处理装置和可添加高盐度海水的压载水处理系统.采用排除法分析并确认该船压载水处理装置选型和相关压载水处理系统设计修改优化,使该船实现在海水港口或浑浊的淡水港口进行即压即排的压载水作业,为今后可能的后续船或类似船型的压载水处理系统设计...     

新一代化学品船安全防护技术研究

根据IMO关于国际散装运输危险化学品船舶结构和设备规范,针对化学品船高温货品运输的特殊要求,设计了化学品船货品温度监控系统.系统采用了DCS结构、PLC控制技术和双循环系统.该温度监控系统可以解决危险化学品运输和装卸的安全防护问题,是对新一代化学品船关键技术的有益探索.     

燃气流公共排导和同心筒技术在舰载导弹垂直发射装置中的应用分析

燃气流公共排导是当今舰载导弹垂直发射装置最为常用的一种燃气排导模式，同心简技术是近年来新兴的一种垂直发射技术。从结构特性人手，对两种类型发射装置的多项性能指标进行分析和比较，同心筒技术在燃气排导性能、可靠性、安全性等方面具有一定优势，而采用公共排导技术的发射装置在备弹量、适装性等指标卜占优。两种技术各有特点，应根据实际使用要求以及不同的装舰对象区别应用。     

A co-integration approach to forecasting container carriers’ time charter rates

A vector autoregressive model was developed for a sample of container carrier time charter rates.Although the series of time charter rates are themselves found non-stationary, thus precluding the use of manymodeling methodologies, evidence provided by co-integration tests points to the existence of stable long-termrelationships between the series. An assessment of the forecasts derived from the model suggests that the spec-ification of these long-term relationships does not improve the accuracy of long-term forecasts. These resultsare interpreted as a corroboration of the efficient market hypothesis.