基于优化模型及多重数据处理的舰船污损监测法

针对目前舰船污损监测受环境和航行状态限制而无法实现连续监测的问题,提出了一种基于优化模型并对数据进行多重处理的舰船污损监测法。首先对轴功率与航速关系监测模型进行优化,将现有一维模型提高到更大航速区间内成立的二维模型。然后采集相关数据,根据其采集条件进行数据筛选及数据修正的多重处理,提高监测的连续性。其次建立污损阀值,与计算结果对比分析得到监测结论。最后将实船应用的监测结论与船体污损情况对比,验证了该方法的可行性和有效性。     

海船主机ALPHA电控汽缸注油器系统典型报警与故障诊断

文章简要介绍了ALPHA电控汽缸注油器系统的构架和工作原理。根据长期的电控汽缸注油系统研发和实船应用操作管理经验,总结分析了海船主机ALPHA注油系统所遇到的典型报警及其故障诊断处理,可为促进先进电子控制技术在船舶上的应用操作管理和研发水平提供有益参考。     

基于船舶领域和MMG的最晚施舵点/CRI研究

提出了一种基于MMG和船舶领域的LSP计算模型,以及改进的空间碰撞危险度（space collision risk index,SCRI）/时间碰撞危险度（time collision risk index,TCRI）模型,并进行了计算机仿真.结果表明：水动力模型精度可满足研究与实践要求;基于二分法的LSP模型能快速、可靠收敛;LSP和SCRI/TCRI模型更符合海员通常做法和避碰规则的公认理解.     

Verifying liner Shipping Alliance’s stability by applying core theory

The core is a vital concept in cooperative game theory and has been widely used in analyzing alliance’s stability. It is especially interesting to apply core theory in liner shipping market due to the latter’s exceptional characteristic of non-homogeneous cost curves as well as divisible and fluctuant demand. Having observed some new phenomena and trends in the industry, this paper studies the economic performance and stability of liner shipping alliance by applying core theory where business cooperation is partly realized by delivering joint-service with mega container ships. To demonstrate the core situation in liner shipping alliance, a cost function is first identified on the basis of two assumptions regarding cooperation: 1) sharing or pooling vessels and 2) deploying mega container ships if needed. Taking cost functions as basis, two conditions of approaching core may be groomed, i.e., collective rationality and individual rationality. The first condition is discussed from the perspective of market, while the second condition is studied within the alliance. Stability of liner shipping alliance is then observed based on these two conditions. An illustrative case study is conducted in order to show some implications and explicitly clarify the theory.     

大型舰艇编队通信指挥决策方案效能评估

为了对大型舰艇编队通信指挥决策方案的效能进行评估,建立了一套通信指挥决策方案效能评估的指标体系,采用基于层次分析和模糊综合评判的方法对大型舰艇编队通信指挥决策方案的效能进行了评估.分析结果表明,该指标体系和评估方法能够快速直观地反映通信指挥决策方案在某一任务环境下的综合效能并对多个方案进行优选.     

船舶下舵承间隙及结构问题分析与对策

结合船舶下舵承在设计、安装和船舶营运过程中面临的问题,根据船级社相应规范和标准对船舶下舵承的规定,分析舵承间隙及结构,提出相应的解决方案。实践证明该方案可行。     

基于元胞理论的船厂码头移泊作业问题算法

为了解决大规模船厂的码头移泊作业问题，基于船舶移动路径具有过程演进的特性，建立了码头移泊作业问题的元胞数学模型。按照问题元胞模型的演进特性和演变规则，采用蚁群智能算法来对模型进行求解，并论证了该算法的收敛性。通过实例计算，其结果与船厂实际操作安排进行比较和分析，验证了该算法的有效性和优越性。     

某汽车滚装船甲板结构的有限元计算分析

由于滚装船对甲板强度具有较高要求,实际设计过程中需要对其进行认真计算和校核.文中结合一艘客改滚装船的改造设计,按照中国船级社有关规范利用有限元软件ANSYS校核了该滚装船的甲板结构强度.提供了3种甲板结构设计方案,并对3种方案分别进行计算、分析、对比.     

嘉兴至绍兴跨江大桥防撞方案的确定

嘉兴至绍兴高速公路跨钱塘江大桥位于强涌潮区,航行条件较复杂。根据嘉绍跨江大桥特定的自然、水文、通航条件,提出了桥梁防撞方案,为大桥的建设及营运管理提供参考意见。     

Evaluation of expected maximum values of forces acting on containers and lashing rods on a container ship

The appearance of a number of large container ships in the 8000 TEU range raises the importance of a plan for container lashing arrangements on deck in relation to the design of the ship. Therefore, it is expected that a new method for evaluating the lashing arrangements on deck will be introduced which is applicable regardless of the ship's size and the lashing pattern, instead of using the standards of several different societies, as happens at present. To evaluate the lashing arrangements on deck, the expected maximum values of the forces acting on the containers and lashing rods should be evaluated. This paper presents a new method of evaluating the container lashing arrangements on a container ship using an "acceleration ellipsoid." The applicability of the acceleration ellipsoid to an evaluation of the expected maximum values of the forces was examined by comparing the expected maximum values of the forces calculated by the long-term distribution calculation known as the "Fukuda method," to those calculated using the acceleration ellipsoid. By comparing these results, it was confirmed that the expected maximum values of the forces calculated using the acceleration ellipsoid were not less than those calculated through by the long-term distribution calculation. It is concluded that the acceleration ellipsoid can be used to evaluate the expected maximum values of the forces acting on containers and lashing rods. Received: December 14, 2000 / Accepted: March 22, 2001