喷气偏流板装置执行机构运动学研究

通过分析喷气偏流板装置运动执行机构的工作原理,建立了该机构的机构模型简图.针对该机构中双平面四连杆机构的末端执行元件,采用图解法分析该机构的运动虽然形象直观,但精度低而且耗费时间长.本文利用解析方法建立了喷气偏流板的角位移、角速度、角加速度的数学模型,并在VC6.0开发平台上进行了机构的运动学仿真.仿真结果表明,理论分析正确,可进一步为该机构的参数优化提供理论依据.     

船用蓄电池保养装置旋盖机构的建模和运动仿真

介绍使用Pro／E与ADAMS建立船用蓄电池保养装置中旋盖机构的虚拟样机方法，建立三维模型样机并进行了运动仿真分析。分析过程中使用参数化设计方法得到适合机构运动要求的零件参数，为旋盖机构和安装平台的整体设计提供了理论依据。     

基于SIMULINK和VRML的一种简易仿真方法

本文提出了一种简易的虚拟现实仿真方法。主要是利用MATLAB作为计算平台,通过结合SIMULINK仿真工具,对建立的虚拟现实标记语言VRML模型实现仿真。并通过一个四连杆机构的运动仿真实例说明该方法的仿真思路。     

调距桨的UG与ADAMS联合仿真研究

将CAD建模和动力学仿真相结合,利用三维造型软件UG建立调距桨的几何实体模型,并添加约束并施加负载.在动力学分析软件ADAMS中动态模拟机构的运动,以平面曲线图反映调距桨在给定条件下的运动学特性,为调距桨特性研究与精确控制提供理论依据.     

基于UG的襟翼驱动机构的运动仿真分析

将收放式减摇鳍襟翼驱动机构简化为曲柄导杆机构,利用UG/Motion模块对其进行运动仿真,构件的受力变化情况以图表形式输出,通过与解析法建立的力学模型进行比较验证仿真的真实性,同时初步分析摩擦副对机构受力情况的影响,为该机构本身的结构优化乃至减摇鳍的整体设计计算提供参考依据。     

深潜救生艇收放装置关键技术研究

为了保证深潜救生艇下水和起吊过程的安全,提出了深潜救生艇收放装置关键技术,包括纵横摇缓冲保护技术和恒张力控制技术.从理论分析出发,分析母船船体和深潜救生艇运动状态和受力情况,建立运动模型,进行了计算机仿真,提出了收放装置纵横摇缓冲机构的设计原则.在恒张力控制研究方面,重点分析深潜救生艇在水面的运动与受力状态,进行了起吊缆恒张力控制仿真试验.利用起吊绞车试验模型进行起吊缆恒张力控制试验研究,验证分析和仿真的结果,为设计提供了技术基础.     

基于Weis-Fogh效应的顶杆-翼板型波浪能发电装置设计

为提高波浪能发电装置的发电效率与适应能力,利用Weis-Fogh效应可以产生瞬态高升力的特点,设计顶杆-翼板型波浪能发电装置,基于Weis-Fogh理论设计翼板形状并建立翼板运动方程,结合强度理论求解并校核顶杆的尺寸,应用ANSYS软件对顶杆-翼板组合体进行应力仿真。理论分析及仿真结果表明该组合体结构强度满足安全要求。     

一种新型船模水动力性能测试装置研究

目前,国内外的船模水动力性能测试装置均为平面运动机构,使得船舶水动力导数的测量范围有限,而一种新型船模水动力性能测试装置,即六自由度船模水动力性能测试装置可以扩大这一测量范围。从六自由度平台的工作原理,六分力天平量程的确定和测试装置总体设计3个方面来具体研究和设计六自由度船模水动力性能测试装置。首先具体介绍六自由度平台的工作原理,即平台6根运动杆的运动与船舶六自由度运动的对应关系;然后建立船舶六自由度运动所受力和力矩的初步计算公式,以国内外平面运动机构的具体技术性能指标为依据,确定试验装置中的六分力天平的量程;最后确定测验装置的整体设计,设计出现有船池拖车平台的具体形状与尺寸。以此为依据,综合考虑拖车平台的受力情况及拖车架和六自由度平台的安装方式,确定拖车架的具体结构形式与尺寸大小,得到三维示意图、二维安装图与尺寸图,进行结构强度分析。     

一种新型船模水动力性能测试装置研究

目前,国内外的船模水动力性能测试装置均为平面运动机构,使得船舶水动力导数的测量范围有限,而一种新型船模水动力性能测试装置,即六自由度船模水动力性能测试装置可以扩大这一测量范围.从六自由度平台的工作原理,六分力天平量程的确定和测试装置总体设计3个方面来具体研究和设计六自由度船模水动力性能测试装置.首先具体介绍六自由度平台的工作原理,即平台6根运动杆的运动与船舶六自由度运动的对应关系;然后建立船舶六自由度运动所受力和力矩的初步计算公式,以国内外平面运动机构的具体技术性能指标为依据,确定试验装置中的六分力天平的量程;最后确定测验装置的整体设计,设计出现有船池拖车平台的具体形状与尺寸.以此为依据,综合考虑拖车平台的受力情况及拖车架和六自由度平台的安装方式,确定拖车架的具体结构形式与尺寸大小,得到三维示意图、二维安装图与尺寸图,进行结构强度分析.     

基于Adams的调距桨滑块式调距机构运动学分析

主要进行调距桨滑块式变距机构的运动学分析,在设计工况下,通过运动学分析软件Adams对调距桨的变距机构进行仿真,得出相应工况下变距机构各个部件的运动参数,并将运动参数与设计理论参数对比,为此种螺旋桨调距机构的设计和生产提供理论依据。     

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.     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

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第34届海洋、离岸及极地工程国际会议(英文)

正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 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;     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

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.     

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.     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.