关于EEDI衡准基线的研究

EEDI(能效设计指数)是衡量船舶在航行中CO_2排放量的考核指标,EEDI衡准基线则是船舶CO_2排放量合格与否的分界线。通过对EEDI的本质和影响因素的详细分析研究,提出了以装载量为自变量、以船速为参变量、按不同船舶类别表达和生成EEDI衡准基线的方法。实例验证结果表明,该方法合理、实用、有效,与目前不计船速影响的方法相比,准确性有了明显的改善,可以作为EEDI衡准基线正确表达和生成的一种新方法。     

小型油船散货船EEDI衡准问题分析

<正>国际海事组织（IMO）在MEPC第62次会议上正式推出了船舶能效设计指标（EEDI）标准,经过10多年的推进完善,目前EEDI已经成为船舶设计的基本指标。EEDI指数表征的是船舶运输单位载重吨货物航行单位海里时CO2的排放量,根据IMO要求,新造船舶的能效指标EEDI指数按阶段递减,至2025年,主要大型船舶的EEDI指数需下降30%。对于小型船舶,     

15万吨级穿梭油船结构减重设计与EEDI影响评估

以15万吨级穿梭油船为例,提出一种可有效减少船体空船重量的设计方案,并评估船体减重对能效设计指数(EEDI)的影响。结果表明：与母型船相比,设计船的空船重量减少1 464 t;设计船将减重用于增加货物载重量,其EEDI可降低约1.0%。该穿梭油船的结构减重方案与可靠性评估方法可为同类型船舶的设计与开发提供参考。     

基于降低船舶能效设计指数(EEDI)值的研究

EEDI(能效设计指数)是衡量船舶在航行中CO2排放量的考核指标。依据MEPC.59提出的EEDI临时指导公式分析其内涵、意义,以及EEDI参考线的回归计算。通过分析实施新的EEDI时对船舶的影响,得出降低EEDI值的常用方法,研究结果可以为船舶设计者在进行相关船舶的EEDI计算时提供参考和指导,具有较好的实用性。     

基于主机功率控制的航速优化

正0引言国际海事组织(IMO) 2011年7月15日在MARPOL公约框架内新增船舶能效规则,对新造船舶能效设计指数(EEDI)和营运船能效营运指数(EEOI)分别提出限值、管理要求。为实现该目标,科研人员通过船体线型优化、轻量化设计、节能附体设计、高效柴油机技术、高性能船体油漆等技术措施提高船舶能效,船舶管理人员通过改进航次计划、气     

营运船舶CO2排放限值与船舶能效设计指数标准比较

为提高船舶能效水平,国际海事组织推动实施船舶能效设计指数（EEDI）标准,我国发布《营运船舶CO2排放限值及验证方法》标准。在介绍EEDI基准线和限值标准限值确定方法的基础上,比较国际航行船舶EEDI基准线与我国沿海干散货船、内河A级航区干散货船限值标准限值之间的差异,并分析比较结果及差异原因,提出应考虑适航水域设计船舶能效要求。     

基于MATLAB的船舶能效设计指数辅助计算系统开发

船舶能效设计指数(EEDI)是表征船舶固有CO_2排放水平评价指标,主要用于对营运船舶的二氧化碳排进行控制及限制,以降低全球温室气体排放对大气环境的影响。从《绿色船舶规范》研究入手,分析EEDI影响因子之间的相互影响关系,建立船舶能效设计指数计算的优化流程与方法,基于MATLAB软件平台开发船舶能效设计指数辅助计算系统,以解决人为计算过程的误差问题,并以某散货船为实例进行验证。     

船体梁刚度对波激振动影响的比较研究

船舶大型化发展的趋势使得其尺度越来越大,而结构轻量化设计的需求则使高强度钢被大量应用于其结构设计之中,相对于传统的小尺度船舶,相对刚度的下降使得船体梁变得越来越"软",这将导致大型船舶在波浪中航行时船体结构波激振动特性发生变化。采用模型试验和理论预报的方法,研究某大型工程船在不同船体梁刚度下的低频和高频垂向波浪载荷响应。分段试验模型采用2种横剖面惯性矩的钢质梁,用以分别模拟船舶横剖面原始的和变化后的刚度。采用三维水弹性理论对该船在波浪中的响应进行预报,并与模型试验结果进行比较。结果显示:小刚度的船体梁更易在波浪中发生波激振动;频繁的波激振动将导致结构发生严重的疲劳损伤问题。这种刚度变化对船体梁波激振动的影响规律表明,有必要将刚度作为大型船舶结构优化设计的重要参数之一。     

对新造船能效设计指数的思考

EEDI旨在鼓励船东及船舶设计者通过技术改进和使用节能技术,使新造船在设计和建造阶段尽可能达到高的能效标准。文章简介了船舶"能效设计指数"(EEDI)的发展历程,通过对EEDI公式和参数的简要说明,初步探讨了在现有公式基础上优化EEDI指数的途径和措施。     

关于EEDI和最小推进功率综合优化的研究

论文建立了EEDI和船舶最小推进功率综合优化模型。EEDI优化需要满足IMO关于船舶最小推进功率的要求。为了协调船舶降低EEDI与满足船舶最小推进功率之间的矛盾,论文致力于发展一种有效且快速的、船舶最小推进功率约束下的船舶主尺度EEDI优化方法。目标函数EEDI的评估基于中国船舶科学研究中心开发的水动力性能数字化图谱。为了与图谱所涵盖的船型保持一致,论文中的船体变换采用仿射变换和Lackenby方法。为了说明该方法,选取VLCC为研究对象,并选取了不同的优化算法。计算结果表明:EEDI和船舶最小推进功率综合优化模型是合理且行之有效的,优化过程中每个方案都能得到一个光顺的船型。     

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.     

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.     

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.     

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.     

舰艇反鱼雷技术

对目前舰艇反鱼雷技术中的非杀伤、软杀伤和硬杀伤等比较先进的手段进行了阐述,并在此基础上分析研究了舰艇反鱼雷技术的发展趋势。     

A simplified method for reliability- and integrity-based design of engineering systems and its application to offshore mooring systems

This paper presents a simplified method for the reliability- and the integrity-based optimal design of engineering systems and its application to offshore mooring systems. The design of structural systems is transitioning from the conventional methods, which are based on factors of safety, to more advanced methods, which require calculation of the failure probability of the designed system for each project. Using factors of safety to account for the uncertainties in the capacity (strength) or demands can lead to systems with different reliabilities. This is because the number and arrangement of components in each system and the correlation of their responses could be different, which could affect the system reliability. The generic factors of safety that are specified at the component level do not account for such differences. Still, using factors of safety, as a measure of system safety, is preferred by many engineers because of the simplicity in their application. The aim of this paper is to provide a simplified method for design of engineering systems that directly involves the system annual failure probability as a measure of system safety, concerning system strength limit state. In this method, using results of conventional deterministic analysis, the optimality factors for an integrity-based optimal design are used instead of generic safety factors to assure the system safety. The optimality factors, which estimate the necessary change in average component capacities, are computed especially for each component and a target system annual probability of system failure using regression models that estimate the effect of short and long term extreme events on structural response. Because in practice, it is convenient to use the return period as a measure to quantify the likelihood of extreme events, the regression model in this paper is a relationship between the component demands and the annual probability density function corresponding to every return period. This method accounts for the uncertainties in the environmental loads and structural capacities, and identifies the target mean capacity of each component for maximizing its integrity and meeting the reliability requirement. In addition, because various failure modes in a structural system can lead to different consequences (including damage costs), a method is introduced to compute optimality factors for designated failure modes. By calculating the probability of system failure, this method can be used for risk-based decision-making that considers the failure costs and consequences. The proposed method can also be used on existing structures to identify the riskiest components as part of inspection and improvement planning. The proposed method is discussed and illustrated considering offshore mooring systems. However, the method is general and applicable also to other engineering systems. In the case study of this paper, the method is first used to quantify the reliability of a mooring system, then this design is revised to meet the DNV recommended annual probability of failure and for maximizing system integrity as well as for a designated failure mode in which the anchor chains are the first components to fail in the system.     

Community-Based Management for Sustainable Fisheries Resources in Phang-nga Bay,Thailand

Fishing communities, the Government of Thailand Department of Fisheries, local nongovermnental organizations, universities, the Food and Agriculture Organization of the United Nations (FAO), and FAO's Bay of Bengal Program have undertaken a partnership in management of Phang-nga Bay's coastal resources. It is the first project of its kind in Thailand, and although still in the early stages, offers insights that may contribute to our knowledge of how we can improve our management of coastal resources, including the importance of (1) building relationships within the governance process; (2) combining education, enforcement, and economic incentives to achieve compliance; (3) implementing solutions early; and (4) government support of community-based decisions. These insights reinforce trends emerging in other coastal management projects in the Asian region.     

含裂纹钢板复合材料修补强度和刚度数值分析

用ANSYS有限元分析软件对复合材料补片修复含边裂纹和中心裂纹钢板的强度和刚度进行了数值分析.引入相对刚度的概念,研究了钻有止裂孔裂纹的长度对损伤钢板相对刚度的影响,分析了损伤钢板刚度复合材料贴片修补效果;引入屈服载荷提高率的概念,分析了损伤钢板强度的修复效果.     

混凝土道路、堆场面层裂缝的产生与防治

从混凝土道路、堆场的各个结构层分析裂缝产生的原因,并针对性地说明预防措施,阐述裂缝维修方法。     

单相PWM整流器的建模与仿真分析

文章详细分析了单相VSR型PWM整流器的整流原理,建立了电流内环,电压外环的单相VSR型PWM整流控制器的数学模型和逻辑框图。在MATLAB／Simulink软件环境中进行了仿真,分析了模型的可行性。