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Measurements of Wind Loads on Side-by-Side Semi-Submersibles in A Wind Tunnel

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China Ocean Engineering 2021年第4期35卷 531-543页

作者： DONG Qing GUO Xiao-xian YANG Jian-min lu hai-ning HUANG Longwei State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University(SJTU)Shanghai 200240China SJTU Yazhou Bay Institute of Deepsea Technology Sanya 572000China

The multi-body system has been a popular form for offshore operations in terms of high *** wind effects are crucial which directly affect the relative positions of floating bodies and operating *** this study,the aerodynamic characteristics for two coupled semi-submersibles were analyzed in a wind tunnel to fill the gaps in literature related to the wind sheltering on offshore *** influences of separation distance were also *** to the results,substantial shielding effects were observed and wind forces on the shielded vessel decreased dramatically:a reduction in the transverse force could be up to 74%.Moreover,the longitudinal wind load was amplified by the platform abreast in a side-by-side *** expected,the interference level became more pronounced with a decreasing separation *** cases in which wind interaction decayed rapidly with distance,logarithmic functions were preferable for describing the relationship between *** linear fitting was reasonable for the transverse wind force when there was still evident sheltering at a quite large *** length of shielding area was another important factor that there was approximately a linear relationship between it and the shielding level for two platforms in close proximity at various wind attack *** on the two parameters,a preliminary wind loads estimation method considering shielding effects was *** approach can aid the industry to have a qualitative assessment of wind sheltering especially at early stages.

关键词： wind loads side-by-side shielding effect wind tunnel test

NUMERICAL AND EXPERIMENTAL RESEARCH ON CURRENT GENERATION IN DEEPWATER OFFSHORE BASIN

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Journal of Hydrodynamics 2007年第5期19卷 551-558页

作者： lu hai-ning YANG Jian-min PENG Tao CHEN Gang State Key Laboratory of Ocean Engineering Shanghai Jiaotong University Shanghai 200030

During the design and construction of the deepwater offshore basin, its current generation system is considered to be one of the key technologies. In this article, the state-of-the-art deepwater offshore basin at Shanghai Jiaotong University was examined as a case study. Different 3-D numerical models of the current generation system were developed and calculated. The uniformity of flow field in the basin, such as horizontal and vertical current velocity profiles, were calculated in detail. Besides, a 1 ： 10 scaled model test was also carried out. The current velocities at different locations in the basin were measured and compared with the calculated results. It is concluded that satisfactory agreement can be resulted between the numerical simulation and model test. In addition, it is suggested that transition sections and turning vanes need to be set in inflow and outflow culverts to improve the uniformity of flow field in the basin. And the hydraulic performance of the deepwater current generation system can meet the requirements of model tests in deep water.

关键词： current generation system deepwater offshore basin ocean engineering model test

Thickness Measurement of Insulation Coating by NIR Spectrometry Based on Boosting-KPLS

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光谱学与光谱分析 2011年第8期31卷 2081-2085页

作者： HAO Hui-min LI Shi-wei ZHANG Wen-dong LI Peng-wei HAO Jun-yu lu hai-ning Ken Jia ZHANG Yong Micro/Nano System Research Center Taiyuan University of Technology Taiyuan 030024 China Automation Company of TISCO Taiyuan 030003 China Northwest Institute of Nuclear Technology Xi＇an 710024 China Department of Research and Development Brimrose Corporation of America Baltimore 21152-9201 USA State Key Laboratory of Electrical Insulation for Power Equipment Xi＇an Jiaotong University Xi＇an 710049 China

A novel thickness measurement method for surface insulation coating of silicon steel based on NIR spectrometry is *** NIR spectra of insulation coating of silicon steel were collected by acousto-optic tunable filter(AOTF) NIR *** make full use of the effective information of NIR spectral data,discrete binary particle swarm optimization(DBPSO) algorithm was used to select the optimal wavelength *** new spectral data,composed of absorbance at selected wavelengths,were used to create the thickness quantitative analysis model by kernel partial least squares(KPLS) algorithm coupled with *** results of contrast experiments showed that the Boosting-KPLS model could efficiently improve the analysis accuracy and *** indicates that Boosting-KPLS is a more accurate and robust analysis method than KPLS for NIR spectral *** maximal and minimal absolute error of 30 testing samples is respectively-0.02 μm and 0.19 μm,and the maximal relative error is 14.23%.These analysis results completely meet the practical measurement need.

关键词： Insulation coating Thickness measurement DBPSO Boosting KPLS

Experimental investigation on drag coefficient for a Truss Spar subjected to vortex induced motions

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Experimental investigation on drag coefficient for a Truss S...

第十一届全国水动力学学术会议暨第二十四届全国水动力学研讨会并周培源诞辰110周年纪念大会

作者： ZHANG Hui YANG Jian-min XIAO Long-fei lu hai-ning State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University

Drag coefficient of a bluff body is a crucial parameter for studying fluid-structure interaction *** characterizes the magnitude of drag force on the *** larger the drag coefficient is,the larger distance the structure is away from its initial *** it is very important in designing the Truss *** the existence of vortex-induced motion(VIM) often exaggerates the drag coefficient. The 1:60 scale Truss Spar model tests have been conducted in towing tank at Zhejiang Ocean University(ZOU).The Truss Spar model consists of a hard tank with removable helical strakes,a truss section and a square soft *** coefficients for both stationary and vibrating Truss Spar were carefully *** current flow is uniform in all test cases and the Reynolds number is from 7E04 to *** was found that the drag coefficient of vibrating Truss Spar is obviously larger than that of stationary Truss Spar,and the drag coefficient of the Truss Spar with strakes is larger than that of the Truss Spar without *** the drag coefficient is also affected by current headings.

关键词： Truss Spar vortex-induced motions drag coefficient

来源： cnki会议评论

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二次压板的智能化运行及应用探讨

华东电力 2010年第12期38卷 1873-1875页

作者：陆海宁华东电力试验研究院有限公司上海200437

概括了运行、调度各方对二次压板投退状况远方监视的需求,介绍了各地实现的一些运行方法并分析其不足,研制出一种非电量接触,可实现就地、远方对应显示的智能压板系统,并初步探讨该系统在实际中应用的方式方法。

关键词：实时监控智能压板非接触网络

考虑风浪流的TLP张力腿张力响应规律分析(英文)

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船舶力学 2012年第9期16卷 1041-1055页

作者：谷家扬杨建民吕海宁上海交通大学海洋工程国家重点实验室上海200240 江苏科技大学船舶与海洋工程学院江苏镇江212003

文章研究了张力腿平台在风浪流中的张力腿的张力变化规律。推导了微分方程中的质量矩阵、耦合刚度矩阵、阻尼矩阵和运动坐标系下张力腿平台波浪外荷载。采用微元法对立柱和浮筒进行离散,运用龙格—库塔法对张力腿平台耦合运动微分方程... 详细信息

文章研究了张力腿平台在风浪流中的张力腿的张力变化规律。推导了微分方程中的质量矩阵、耦合刚度矩阵、阻尼矩阵和运动坐标系下张力腿平台波浪外荷载。采用微元法对立柱和浮筒进行离散,运用龙格—库塔法对张力腿平台耦合运动微分方程进行了数值求解。对不同海况下和不同浪向角下张力腿平台张力腿张力变化进行了能量谱分析,并在上海交通大学海洋工程国家重点试验室中通过缩尺比为1:40的模型对数值模拟的结果进行了试验验证。比较了考虑风和流以及不考虑风和流的结果。

关键词：张力腿平台非线性随机波不同海况不同浪向角风浪流耦合响应张力腿张力

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低质量比水中井口装置流致运动数值模拟

水动力学研究与进展（A辑） 2010年第4期25卷 534-541页

作者：李鹏杨建民吕海宁上海交通大学海洋工程国家重点实验室上海200240

应用Fluent软件数值模拟三维水中井口装置绕流。对低质量比条件下弹性支撑刚性水中井口装置横向流致运动问题进行计算,对比固定绕流和流致运动条件下的受力情况,并观察不同尾涡形态,分析不同约化速度下流致运动的响应特性。

关键词：数值模拟水中井口装置流致运动流固耦合漩涡脱落

组块运输中的T型驳船水动力性能研究（英文）

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船舶力学 2013年第12期17卷 1426-1438页

作者：许鑫杨建民李欣吕海宁上海交通大学海洋工程国家重点实验室上海200240

在浮托运输和安装中,为了满足平台桩腿间距对安装驳船宽度的限制以及驳船足够的横稳性需要,提出了T型驳船的概念。和传统的驳船相比,T型驳船首尾宽度相差较大,因而具有一些较好的水动力性能。文中分别从频域和时域对T型驳船和传统驳船... 详细信息

在浮托运输和安装中,为了满足平台桩腿间距对安装驳船宽度的限制以及驳船足够的横稳性需要,提出了T型驳船的概念。和传统的驳船相比,T型驳船首尾宽度相差较大,因而具有一些较好的水动力性能。文中分别从频域和时域对T型驳船和传统驳船的水动力性能进行了比较研究。在频域计算程序WAMIT的辅助下,得到了驳船的运动幅值响应算子(RAO)和波浪慢漂力,同时使用FORTRAN自编程序对驳船在不规则波浪下的运动进行时域模拟,得到运动时历和统计值。此外,开展了相应的模型试验研究来验证数值计算结果。通过比较模型试验和数值模拟的结果,发现两者十分吻合,从而验证了数值模拟的可靠性。在此基础上对不同船型的水动力计算结果进行了比较,结果表明T型驳船在组块运输过程中具有较好的水动力性能。

关键词：浮托法 T型驳船海上运输水动力性能

基于小波分析的Spar平台阻尼系数研究（英文）

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船舶力学 2015年第9期19卷 1085-1096页

作者：张蕙杨建民肖龙飞吕海宁上海交通大学海洋工程国家重点实验室上海200240

连续小波分析方法作为典型的时频方法虽已广泛应用于工程界,但在海洋工程领域并未得到大力推广。文章应用连续小波分析方法对海洋工程领域中与Truss Spar平台涡激运动相关的阻尼系数进行求解。通过构建测试信号对这一方法进行数值检验,... 详细信息

连续小波分析方法作为典型的时频方法虽已广泛应用于工程界,但在海洋工程领域并未得到大力推广。文章应用连续小波分析方法对海洋工程领域中与Truss Spar平台涡激运动相关的阻尼系数进行求解。通过构建测试信号对这一方法进行数值检验,验证了小波分析方法的可靠性和准确性。利用试验数据,成功将小波分析方法应用于求解Truss Spar平台阻尼系数问题中。结果表明小波分析方法具有较好的可靠性,能够准确求解平台的阻尼系数。

关键词：连续小波分析阻尼系数涡激运动 Truss Spar