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沉管水下沉放中,管节与船舶采用缆索连接吊放下沉.为解决外海复杂海况条件下,船管缆系耦合受力的状态与水下管节的位移不受控和缆力超限的问题,通过数值仿真计算和物模试验相结合的方式,分析了不同沉放深度的沉管沉放过程中,船舶受外载荷和管节水下受水动力双重作用时的动力响应情况.通过计算和试验,开展了自由状态下的衰减试验、系泊系统下模型单自由度运动衰减试验、作业状态下沉管和安装船运动响应及各缆绳的受力测量,得到系泊缆、沉管吊缆和安装缆,在浪、流组合作用下的受力和水下运动位移情况,选取了适用于本项目管节沉放施工缆系的关键力学取值,并进行了工程应用验证和对比分析,证明了该研究成果的正确性,研究成果可为类似工程大型构件水下精确沉放和施工提供技术依据. 相似文献
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《船舶力学》2021,(10)
沉管水下沉放中,管节与船舶采用缆索连接吊放下沉。为解决外海复杂海况条件下,船管缆系耦合受力的状态与水下管节的位移不受控和缆力超限的问题,通过数值仿真计算和物模试验相结合的方式,分析了不同沉放深度的沉管沉放过程中,船舶受外载荷和管节水下受水动力双重作用时的动力响应情况。通过计算和试验,开展了自由状态下的衰减试验、系泊系统下模型单自由度运动衰减试验、作业状态下沉管和安装船运动响应及各缆绳的受力测量,得到系泊缆、沉管吊缆和安装缆,在浪、流组合作用下的受力和水下运动位移情况,选取了适用于本项目管节沉放施工缆系的关键力学取值,并进行了工程应用验证和对比分析,证明了该研究成果的正确性,研究成果可为类似工程大型构件水下精确沉放和施工提供技术依据。 相似文献
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非线性管土耦合条件下悬跨管道涡激振动响应时域预报 总被引:1,自引:0,他引:1
海底悬跨管道与海床耦合呈现高度非线性,使得发展一种时域预报方法成为需要.文章运用有限元法对输液张紧悬跨管道进行空间离散,并应用Facchinetti等改进的尾流振子模型和切片假定模拟每个有限单元上的涡激振动水动力,发展了一种悬跨管道-海床-流场多场耦合的非线性时域预报方法.在合理选取尾流振子模型附加水动力阻尼参数的基础上,时域预报了线性、理想塑性和张力截断弹簧模型下悬跨管道的涡激振动响应.研究结果表明,基于尾流振子的时域预报方法能够合理地描述非线性管土耦合边界下VIV响应;非线性边界条件下,锁定产生的最大响应幅值低于线性结果. 相似文献
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大型沉管在狭窄航道上沉放水动力数值模拟 总被引:3,自引:0,他引:3
本文以大型沉管在狭窄航道上沉放的工程实践为背景,对狭窄航道沉放大型沉管的水动力特性进行了数值分析,提出了相应的计算模型和方法。利用计算流体力学商用软件FLUENT对沉管沉放过程中的水动力特性进行了数值模拟,利用计算结果分析、观察了大型沉管在狭窄航道上沉放过程中的主要水动力特性。 相似文献
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《江苏科技大学学报(社会科学版)》2021,35(3)
以半潜式拆解平台为研究对象,基于有限元理论、时域耦合理论和系泊缆动力分析理论,对非对称拆解平台单侧起吊过程进行数值模拟.结果表明:起吊过程中,吊物纵荡与横荡运动趋势与平台运动趋势一致;75°吊臂旋转角时,纵荡运动幅度达到最小,而横荡运动幅度达到最大;起吊至一定高度后,文中对360°吊臂旋转角下的平台运动响应进行了分析,找出了大吊载下的危险工况0,30°,90°,并对平台进行了浮态稳性分析,研究成果供工程人员参考. 相似文献
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《船舶与海洋工程学报》2014,(2)
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. 相似文献
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《船舶与海洋工程学报》2014,(1):126-126
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. 相似文献
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联合作战计划和执行系统 总被引:2,自引:1,他引:1
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。 相似文献
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《船舶与海洋工程学报》2014,(1)
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. 相似文献
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《船舶与海洋工程学报》2014,(2)
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. 相似文献
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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). 相似文献
The answer is China South Port Group (Hong Kong, Shenzhen and Guangzhou). 相似文献
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桥梁防撞设施物理模型试验 总被引:1,自引:0,他引:1
物理模型试验是预报防撞设施所受撞击力及优化设计方案的主要方法之一。结合杭州湾大桥柔性防撞设施及东海大桥独立式防撞体设计方案,阐述了船—防撞体撞击试验的基本原理、方法、试验方案及相关试验结果。提出了柔性防撞系统的优化方案。试验结果表明,该方案经济有效,可供预报类似桥梁防撞设施撞击力时参考。 相似文献
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印尼某电厂项目码头水工建筑物包括码头、防波堤和护岸等主要组成部分。在该项目水工建筑物的设计过程中,综合考虑当地的自然条件、施工能力和材料来源等因素,不断优化结构选型和结构断面。根据不同使用要求,护岸分别采用直立式和斜坡式2种结构型式,推荐的设计方案节省投资、施工方便,可供同类工程设计参考。 相似文献
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Lynne Zeitlin Hale Mark Amaral Abdulrahman S. Issa B. A. J. Mwandotto 《Coastal management》2013,41(1):75-85
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. 相似文献