Maxsurf软件在双体帆船阻力计算中的应用

以Fountain Pajot公司的Orana44双体帆船为例,讨论了Maxsurf软件对双体帆船阻力计算是否依然适用的问题,并将Maxsurf软件中的Hullspeed模块的计算结果与循环水池试验的结果进行对比。同时,将计算出的不同速度下的所需动力值与已知的资料进行对比。通过对比分析发现,利用Maxsurf软件计算得到的阻力值较船模试验值偏低,且计算出的动力值小于该船说明书所提供的数据,需进一步验证结果的可靠性。     

基于Hydromax的14000DWT成品油船大倾角稳性计算

大倾角稳性是保证船舶及各种海上结构物安全航行及作业的主要性能之一,也是船舶设计过程中首先要解决的问题。为了快速、准确地给船舶设计者提供初步的稳性计算过程和结果,以14000DWT成品油船为例,采用Maxsurf软件对其进行建模,然后将其导入Hydromax模块进行大倾角稳性计算,并将其结果同设计值、规范值进行比较,符合要求。表明采用Hydromax模块来计算船舶的大倾角稳性的可行性。     

企业介绍

武汉波威高速船舶工程有限公司 该公司是由几位有志于振兴祖国船舶工业的青年科技人员创办的高科技企业。目前主要从事Maxsurf造船软件的国内总代理。 Maxsurf是一套完整的CAD/CAM造船软件,适用于各类船舶的设计、分析和建造。 Maxsurf各模块均采用单一数据库,Windows风格界面简单易学。可方便地与AutoCAD、Mi-crosort office进行文件转换。     

改进的Holtrop船舶阻力估算

针对船舶设计初期阻力估算的经验公式精度低与适用性有限等问题,提出适用于目前三大主力船型的阻力预报方法,基于Holtrop法和现有船型数据库,通过计算结果和试验数据对比分析,修正Holtrop方法中相关估算公式,经修正后的阻力值与试验值对比表明,其阻力预报的精度明显提高。     

MAXSURF软件在计算机辅助船舶设计与建造领域的应用

MAXSURF软件是由澳大利亚Formation Design Systems公司为船舶设计和建造者开发的、适用于各种船舶设计、分析和建造的一套非常完整的计算机辅助船舶设计和建造软件。MAXSURF软件目前在全球已拥有广泛分布在澳大利亚、中国、日本、德国、荷兰、     

基于VB.Net的船舶阻力预报集成化研究

为实现对船舶阻力计算和预报的参数化研究,以10 000 DWT江海直达货船为研究对象,基于CFD技术计算船舶阻力,计算值与船模试验值的对比结果验证了使用CFD技术进行预报工作的可行性。在此基础上,结合计算分析流程并借助VB.NET平台,将所涉及的工程软件集为一体,开发出参数化分析软件,该软件可通过可视化操作进行参数输入及结果输出等操作,软件的计算值与模型试验结果的对比表明,参数化分析具有可靠性。     

3200T油船某舱段结构有限元分析

船舶设计与结构分析是保证船舶安全的基本前提,而如何更有效对船体进行设计和结构强度分析对于船舶安全具有重要意义。本文充分利用了Maxsurf和Ansys两个软件的优势,以对一艘3200T双底单壳油船进行了静水和波浪状态下的纵向强度两方面的计算与分析为例,说明该方法对于船舶设计和强度分析的准确性和有效性都具有重要意义。     

双体甲板运输船波浪载荷

以某双体甲板运输船为例,使用DNV船级社的SESAM软件对其波浪载荷进行直接计算分析,并对比分析了采用“规范方法”与“直接计算方法”得到的波浪载荷值。结果表明,该双体甲板运输船属于低速排水型船,其波浪载荷的计算方法与高速双体船差别较大,“规范方法”主要适用于高速双体船及尺度较小的低速双体船。对于船长为60m及以上的低速双体船,采用“直接计算方法”更能准确地计算出其波浪载荷。     

3200T油船舱段结构有限元分析

船舶设计与结构分析是保证船舶安全的基本前提,而如何更有效对船体进行设计和结构强度分析对于船舶安全具有重要意义.通过充分利用Maxsurf和Ansys两个软件的优势,以对一艘3200T双底单壳油船进行了静水和波浪状态下的纵向强度两方面的计算与分析为例,说明该方法对于船舶设计和强度分析的准确性和有效性都具有重要意义.     

海上长球首球尾双体风电维护船波浪增阻研究

为研究不同球首球尾长度双体风电维护船在波浪中的阻力性能,基于CFD技术,探究适用于双体船运动响应和波浪增阻的数值计算方法。通过与试验结果的对比分析,在计算域设定和网格尺寸方面提出适用于双体船的计算方案。利用此方法计算不同球首球尾长度双体风电维护船的升沉与纵摇以及波浪增阻,为球首球尾双体船以及风电维护船的船型设计与优化提供参考。     

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;     

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.     

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.