基于CFD计算的客滚船滚装处所通风系统设计

针对客滚船滚装处所的通风设计难度大的问题,以某客滚船的滚装处所通风系统为研究对象,使用CFD计算滚装处所内流场和风道内压力,提出通风流场的CDF解决方案.结果 表明:运用CFD计算有利于在设计阶段发现滚装处所通风系统的流场问题,并可以对解决方案进行计算验证,也可以准确地计算风道内的风压损失,有利于风机的选型.     

世界滚装船发展现状

滚装船相对散货船、油船、集装箱船等主力船型来说是一个小众的船型。按照用途．滚装船可分为滚装货船和客滚船．从2000～2012年世界滚装货船和客滚船的订单可以发现,     

中国船级社发布一项新规定

针对客滚船安全检查和评估中发现的有关技术问题，参照国际海事组织的有关规定，兼顾实施中可能遇到的问题，中国船级社规定了《关于现有客滚船滚装装货处所压力水雾灭火系统的技术要求试验与验收方法的暂行规定》，作为确定客滚船滚装货处压力水雾灭火系统适用性的基本依据。 本刊辑     

客滚船车载危险品的查堵

客滚船自投入渤海湾市场运营后，发展迅猛，短短20多年时间，渤海湾客滚船已发展到20多条，还有数条客滚船计划近期投入市场。以烟台一大连航线为例，目前共有14艘滚装客船航行，年旅客进出口500余万人次，滚装车辆年进出口60余万辆，运输量还有逐年增加的趋势。在客滚船航运市场快速发展的同时，如何采取有效措施，切实保障客滚船航行安全，已成为海事主管机关安全监督管理中的重中之重。     

客滚船的结构防火设计

防火设计是客滚船设计中的一项重要内容,是为船员和乘客提供一道生命财产保障。总结了客滚船火灾的成因,介绍了客滚船防火系统的构成及规范要求,重点阐述了客滚船防火分隔,尤其对于主竖区和水平区、滚装处所、救生设备、大型舱室、脱险通道、梯道环围等处所的防火要求进行了分析,进而介绍防火分隔的实现方式,包括绝缘、甲板敷料、挡风条及防火材料的使用等,为客滚船的防火设计提供参考。     

客滚船安全事故分析及对策

为加强对客滚船的管理，保障船舶航行安全，针对客滚船航运市场安全现状，分析客滚船航行安全中存在的主要问题及隐患，提出安全管理对策：（1）限制客滚船开航的天气条件；（2）滚装车辆要严格系固；（3）严防滚装车辆载运危险品；（4）提高船员素质；（5）加强对船公司的管理。     

客滚船通风系统控制功能设计

为减少船舶能耗、增强安全性能，基于某客滚船，从通风马达控制中心、防火风闸控制箱、控制网络和控制逻辑等4个方面对滚装处所通风系统的控制功能设计进行分析。实船验证结果表明：该设计方案可有效减少能耗，保障安全性能。研究成果可为客滚船通风系统的设计提供一定参考。     

客滚船结构设计综述

介绍客滚船的结构布置特征和总纵强度校核特点，重点阐述客滚船典型区域，如双层底、车辆舱及上层建筑的结构设计特点，并详细分析结构设计中滚装设备的协调设计、结构质量重心预估和控制、横向挠曲强度分析以及振动、噪声控制等难点问题，并提出应对措施，为后续该船型的结构设计积累相关经验。     

16 000总吨级客滚船滚装设备制造安装工艺

介绍16000总吨级客滚船的艉跳板(门)、坡道水密门、坡道盖及汽车升降甲板等大型滚装设备钢结构的制造精度控制和安装技术,以及滚装设备制造安装所收到的技术、经济效益。     

中韩航线客滚船设计特点及关键技术

针对近年来客船事故频发,更加严格的规范及相应政策的出台促使中韩航线客滚船运力全面更新的情况,从滚装货物的特点、高效装卸货、旅客舱室及公共娱乐区的特点、线型优化设计、舒适性和环保等方面对中韩航线上运营的新一代客滚船的设计特点及关键技术进行介绍。同时,对中韩贸易的现状进行评价和展望。     

中国高端客滚船的市场前景

通过分析中国目前水上客运市场的现状,提出依托中国绵长的海岸线和丰富的旅游资源以及潜在的客户需求,开拓客运市场、开发高端客滚船航线具有广阔的市场前景,并就市场盈利模式进行探讨,最后提出美学设计是高端客滚船设计建造的核心内容之一。     

Risk analysis for RoPax vessels

The paper presents the results of a recent risk analysis study for RoPax vessels, carried out as part of the activities of the SAFEDOR Integrated Project. The objective of this study was to investigate the causes of hazards during RoPax operation and quantify, to the extent possible, their frequencies and consequences. Potential scenarios initially identified and prioritised during a Hazard Identification (HAZID) session were used in the process.     

Optimization of crashworthy marine structures

History shows that ferry and RoPax collisions with tankers can be devastating for human life. This paper follows up such a scenario to contribute to rational increase of safety of marine structures. Through the coupling of multi-objective structural optimization and crashworthiness analysis, a conventional tanker structure is optimized for higher collision tolerance, accounting for the change in hull mass, so that the increase in safety is efficient. Two new concepts, proposed here, are deemed necessary for the successful execution of this task: a ‘two-stage’ optimization approach, reducing the number of needed collision simulations, and a rapid collision simulation approach that utilizes coarse FE mesh and reduces calculation time. Combining the obtained results with the state-of-the-art knowledge, a new insight about crashworthy design of tanker structures is also realized.     

A critical look at SOLAS CH II-1 with respect to floodable length of compartments in RoPax ships

The paper presents findings of a research project (RP625) funded by the UK Maritime and Coastguard Agency (MCA) with the purpose to provide evidence of equivalence, or lack thereof, between previous and currently in force legislative instruments governing damage stability of RoPax ships, with special focus on inboard spaces with low degree of subdivision, referred as long lower holds (LLH). The outcome of this research brings more clarity and reassurance to the industry and administrations when addressing the specific safety implications of new designs with such large un-subdivided spaces, specifically indicating that the present SOLAS 2009 regulations are able to adequately cater for ship design equipped with LLH.     

Sensitivity analysis of the probabilistic damage stability regulations for RoPax vessels

In the light of the newly developed harmonised probabilistic damage stability regulations, set to come into force in 2009, this article presents a systematic and thorough analysis of the sensitivity of the Attained Subdivision Index with reference to a wide range of related design parameters. The sensitivity of the probabilistic regulations was investigated for a typical large RoPax vessel, with variation of parameters, such as the number, positioning and local optimisation of transverse bulkheads; the presence and position of longitudinal bulkheads below the main vehicle deck; the presence of side casings; and the height of the main deck and double bottom. The effects of water on deck and of operational parameters (draught, centre of gravity and trim) were also investigated. The results of the study, presented in graphical form, can provide valuable assistance to the designer when determining subdivision characteristics at the very early stage of the design process, resulting in optimal, efficient and safe ships.     

Impact scenario models for probabilistic risk-based design for ship–ship collision

A number of authors have proposed probabilistic risk based ship design for ship–ship collision, conditional to the local trading area of a vessel. The probability of collision and consequences are determined based on the traffic conditions in which a vessel is expected to operate. This paper investigates the adequacy of currently available models for impact scenarios, i.e. models linking the traffic conditions to the conditions at the moment of collision. An exploratory statistical model is presented to establish such a link. A probabilistic risk based design case study is performed for a fleet of RoPax vessels trading on a specified route in the Gulf of Finland. The available impact scenario models from the literature are compared with the developed probabilistic evasive maneuvering model. The results show that the impact scenario models have a very significant influence to the calculated hull breach probabilities. No well-justified impact scenario models are presently available and also the presented probabilistic evasive maneuvering model is burdened with uncertainty. Hence, to move toward a probabilistic risk based ship design paradigm for ship–ship collision in a local trading area, more focus and research is needed to establish a credible link.     

Influence of different topological variants on optimized structural scantlings of passenger ship

For a multi-deck ships with extensive superstructures (such as passenger and cruise ships, RoPax, mega yachts, etc.) the global structural response can be particularly complex. The influence of the superstructure to the primary strength for those multi-deck ships must be considered from an early design phase. Main global topological parameters (e.g. size of side openings, position and stiffness of longitudinal and transverse bulkheads, etc.) have dominant influence on the shape of hull girder stress distributions over the ship height. The Taguchi concepts and techniques (FFE, orthogonal arrays, ANOVA, etc.) could be used to systematically study influence of multiple topological parameters on the global structural response obtained by FEM analysis. It also enables rational identification of the most dominant parameters and provide designer with the near-optimal level of each topological parameter for the defined design objective. It has been demonstrated how different topological variants can lead to different optimal structural scantlings w. r.t chosen design objectives (mass, VCG, etc.), using simplified full ship 3D FE model of passenger ship as an example. Structural design software MAESTRO and in-house developed framework for the design support system DeMak – OCTOPUS Designer were used as a structural optimization tool. This paper aim to extend the standard scantling optimization by introducing topological aspects as a first STEP in overall optimization procedure.     

Parametric roll mitigation using rudder control

Severe roll angles can be developed by parametric excitation in relatively moderate weather without any apparent pre-warning for the crew onboard. In this study the prospect of using rudder control to mitigate parametric roll was investigated using multi-degree of freedom simulations. A typical modern Pure Car and Truck Carrier was considered and modelled by coupling a roll model with a planar motion manoeuvring model. The combined model was calibrated using in-service, full-scale trials and model tests. Irregular variations of the metacentric height were applied to simulate recorded, full-scale events of parametric roll that have occurred with the considered design. These simulations with rudder roll control showed promising results and demonstrate that the approach could be very efficient for mitigation of parametric roll.     

数据链轮询多网优化设计方法研究

采用优化设计方法可有效提升数据链网络的整体性能。文章分析了轮询多网的网络结构及工作特点,提出了基于满足消息响应时间的网络优化设计方法,并在轮询单网优化设计理论的基础上,建立了轮询多网的优化设计理论。该理论将轮询多网问题转换成轮询单网问题,从而使网络优化设计方法得以简化,且能有效提升网络的容量及资源利用率。     

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.