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Coupled dynamic response analysis of multi-column floating offshore wind turbine with low center of gravity

Journal of Ocean Engineering and Science 2024年第1期9卷 25-39页

作者： Jie yang yan-ping he Yong-sheng Zhao Xiao-yan yang Guo-rong Zhang State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai Jiao Tong UniversityShanghai 200240China School of Naval Architecture Ocean&Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Faculty of Maritime and Transportation Ningbo UniversityNingbo 315211China

To realize the application of the floating offshore wind turbine(FOWT)from deep to relatively shallow waters,a new concept of multi-column floating wind turbine platform with low center of gravity(CG)is designed and *** multi-column low CG platform is designed to support a 6MW wind turbine class and operated at a water depth of 50m in the South China *** frequency domain software WADAM and time domain software NREL-FAST are used to simulate coupled dynamic responses of the floating wind turbine system with second-order wave loads *** dynamic behaviors of multi-column low CG FOWT system under normal operation and parked conditions are *** influence of second-order wave force on the motion responses of the multi-column platform,fore-aft force and moment of the tower base and mooring force are researched *** results demonstrate that the coupled dynamic responses at rated operating condition and extreme condition meet the normal operating requirements and extreme survival requirements of FOWT system in the shallow water(50m)of South China *** addition,it is found that,the wave frequency response gradually replaces the second-order low frequency response as the main influencing factor of the coupled dynamic response of the FOWT system with the increasing severity of the sea ***,in general,the magnitude of second-order low frequency response increases with the increasing severity of the design load ***,in the subsequent design of the shallow water FOWT system,the second-order effects should be paid enough attention.

关键词： Floating offshore wind turbine Multi-column platform Second-order wave force Concept design Coupled dynamic response

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深吃水圆筒型浮式核能平台涡激运动数值模拟

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船舶力学 2024年第2期28卷 239-249页

作者：曹辰泽何炎平王梓刘亚东上海交通大学海洋工程国家重点实验室上海200240 上海交通大学船舶海洋与建筑工程学院上海200240 上海交通大学海洋装备研究院上海200240

深吃水圆筒型浮式核能平台是一种新型多功能高效平台,可有效解决南海岛礁开发过程中的能源供给问题。在一定来流速度下,尾流区交替泄涡进而诱导平台发生涡激运动(vortex induced motions,VIM),这将严重加速系泊和立管系统疲劳损害,同时... 详细信息

深吃水圆筒型浮式核能平台是一种新型多功能高效平台,可有效解决南海岛礁开发过程中的能源供给问题。在一定来流速度下,尾流区交替泄涡进而诱导平台发生涡激运动(vortex induced motions,VIM),这将严重加速系泊和立管系统疲劳损害,同时对平台内部核反应堆运行产生不利影响。基于改进的延迟分离涡方法(improved delayed detached eddy simulation,IDDES)对平台在不同折合速度下的横荡、纵荡、艏摇运动响应进行数值模拟,并从水平面内质心运动轨迹、运动频率、三维流场特性等角度分析涡激运动关键特征。研究结果表明:当折合速度5.45

关键词：深吃水圆筒型浮式核能平台涡激运动 IDDES 重叠网格法

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家庭医生签约服务的健康效应及作用机制研究——来自6省12县1191位农村慢性病患者的证据

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中国卫生政策研究 2024年第8期17卷 19-27页

作者：何艳平张晓丹姚强武汉大学政治与公共管理学院湖北武汉430072 武汉大学社会保障研究中心湖北武汉430072

目的:探究家庭医生签约服务对农村慢性病患者健康的影响及作用机制。方法:2023年6—8月,通过面对面问卷调查收集了6省12县有效样本1191份,利用Tobit模型和KHB方法分析家庭医生签约服务对EQ-5D-5L效用值的影响和作用路径。结果:我国农村... 详细信息

目的:探究家庭医生签约服务对农村慢性病患者健康的影响及作用机制。方法:2023年6—8月,通过面对面问卷调查收集了6省12县有效样本1191份,利用Tobit模型和KHB方法分析家庭医生签约服务对EQ-5D-5L效用值的影响和作用路径。结果:我国农村地区慢性病患者家庭医生签约率为59.19%,健康效用值为0.831;家庭医生签约服务显著提高了慢性病患者的效用值(β=0.047,P<0.05);且通过公共卫生服务利用完全中介路径影响效用值(β=0.028,P<0.01,95%CI=0.009~0.047),间接效应占总效应的66.77%。结论:我国农村地区慢性病患者家庭医生签约率较低,健康相关生命质量较差,我国家庭医生签约服务主要通过提高公共卫生服务利用改善慢性病患者健康状况,尚需加强家庭医生签约服务在医疗服务利用和个人自我保健行为方面的影响,以充分发挥家庭医生签约服务的综合健康效应。

关键词：家庭医生签约服务慢性病患者健康相关生命质量健康效用作用机制 KHB中介分析

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Influence of pH, heat and Enzymatic Treatments on the Activity of Antibacterial Substance in MRS and Milk Media Produced by Lactobacillus fermentum F6

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Agricultural Sciences in China 2010年第6期9卷 911-920页

作者： ZHANG Yong LIU Yong BAO yan ZHANG he-ping Key Laboratory of Dairy Biotechnology and Engineering Ministry of Education/Department of Food Science and Engineering InnerMongolia Agricultural University Hohhot 010018 P.R. China

This study aimed to investigate the influence of pH,heat and enzymatic treatments on the activity of antibacterial substance in MRS,skim soy milk and bovine milk media fermented by a potential probiotic Lactobacillus fermentum *** antibacterial activity of the culture supernatant of *** F6 was tested against a wide range of Gram-positive and Gram-negative pathogenic bacteria including Staphylococcus aureus,Escherichia coli,Listeria monocytogenes,Salmonella typhimurium,and Shigella *** antibacterial activities were detected in MRS and milk but not in soy *** presumed that three kinds of probable components including organic acids,heat-stable and heat-labile proteinaceous compounds were involved in antibacterial activity of fermented MRS and *** influence of acids on antibacterial activity was pH-dependent and this effect multiplied with thermal treatments seemed *** analyses showed various significant differences of antibacterial activity among five pathogens were observed in pH and heat *** untreated fermented milk showed higher inhibitory activity to Gram-positive pathogenic bacteria than Gram-negative bacteria （P 〈 0.05）,indicating antibacterial substances of fermented milk are greatly different from fermented *** accurate stimulated gastrointestinal transit showed antibacterial substances would have no influence on intestinal *** range of antibacterial substances from pH 2.0 to 6.0 can be potentially used as food biopreservatives and alternative therapeutics.

关键词： Lactobacillusfermentum F6 antibacterial activity pH thermal treatments enzymatic effect

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Experimental Study on Aerodynamic Characteristics of the Model Wind Rotor System and on Characterization of A Wind Generation System

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China Ocean Engineering 2019年第2期33卷 137-147页

作者： MENG Long he yan-ping ZHAO Yong-sheng PENG Tao yanG Jie State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) School of Naval Architecture Ocean&Civil EngineeringShanghai Jiao Tong University

In order to investigate the aerodynamic characteristics of 6-MW wind turbine, experimental study on the aerodynamic characteristics of the model rotor system and on characterization of a wind generation system is carried out. In the test, a thrust-matched rotor system and a geometry-matched rotor system, which utilize redesigned thrustmatched and original geometry-matched blades, respectively, are applied. The 6-MW wind turbine system is introduced briefly. The proper scaling laws for model tests are established in the paper, which are then implemented in the construction of a model wind turbine with optimally designed blades. And the parameters of the model are provided. The aerodynamic characteristics of the proposed 6-MW wind rotor system are explored by testing a 1:65.3 scale model at the State Key Laboratory of Ocean Engineering at Shanghai Jiao Tong University. Before carrying out the wind rotor system test, the turbulence intensity and spatial uniformity of the wind generation system are tested and results demonstrate that the characterization of the wind generation system is satisfied and the average turbulence intensity of less than 10% within the wind rotor plane is proved in the test. And then, the aerodynamic characteristics of 6-MW wind rotor system are investigated. The response characteristic differences between the thrust-matched rotor system and the geometry-matched rotor system are presented. Results indicate that the aerodynamic characteristics of 6-MW wind rotor with the thrust-matched rotor system are satisfied. The conclusion is that the thrust-matched rotor system can better reflect the characteristics of the prototype wind turbine. A set of model test method is proposed in the work and preparations for further model basin test of the 6-MW SPAR-type floating offshore wind turbine system are made.

关键词： thrust-matched rotor system geometry-matched rotor system wind generation system experimental study aerodynamic characteristics

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Concept Design and Coupled Dynamic Response Analysis on 6-MW Spar-Type Floating Offshore Wind Turbine

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China Ocean Engineering 2017年第5期31卷 567-577页

作者： MENG Long ZHOU Tao he yan-ping ZHAO Yong-sheng LIU Ya-dong State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) School of Naval Architecture Ocean & Civil EngineeringShanghai Jiao Tong University

Tower, Spar platform and mooring system are designed in the project based on a given 6-MW wind turbine. Under wind-induced only, wave-induced only and combined wind and wave induced loads, dynamic response is analyzed for a 6-MW Spar-type floating offshore wind turbine （FOWT） under operating conditions and parked conditions respectively. Comparison with a platform-fixed system （land-based system） ofa 6-MW wind turbine is carried out as well. Results demonstrate that the maximal out-of-plane deflection of the blade of a Spar-type system is 3.1% larger than that of a land-based system; the maximum response value of the nacelle acceleration is 215% larger for all the designed load cases being considered; the ultimate tower base fore-aft bending moment of the Spar-type system is 92% larger than that of the land-based system in all of the Design Load Cases （DLCs） being considered; the fluctuations of the mooring tension is mainly wave-induced, and the safety factor of the mooring tension is adequate for the 6-MW FOWT. The results can provide relevant modifications to the initial design for the Spar-type system, the detailed design and model basin test of the 6-MW Spar-type system.

关键词： Spar-type floating offshore wind turbine concept design combined wind and wave loads coupled dynamicresponse

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Experimental Study on New Multi-Column Tension-Leg-Type Floating Wind Turbine

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China Ocean Engineering 2018年第2期32卷 123-131页

作者： ZHAO Yong-sheng She Xiao-he he yan-ping yanG Jian-min PENG Tao KOU Yu-feng State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200030China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai Jiao Tong UniversityShanghai 200030China Shanghai University of Engineering Science School of ManagementShanghai 201620China

Deep-water regions often have winds favorable for offshore wind turbines, and floating turbines currently show the greatest potential to exploit such winds. This work established proper scaling laws for model tests, which were then implemented in the construction of a model wind turbine with optimally designed blades. The aerodynamic,hydrodynamic, and elastic characteristics of the proposed new multi-column tension-leg-type floating wind turbine(Wind Star TLP system) were explored in the wave tank testing of a 1:50 scale model at the State Key Laboratory of Ocean Engineering at Shanghai Jiao Tong University. Tests were conducted under conditions of still water, white noise waves, irregular waves, and combined wind, wave, and current loads. The results established the natural periods of the motion, damping, motion response amplitude operators, and tendon tensions of the Wind Star TLP system under different environmental conditions, and thus could serve as a reference for further research.

关键词： floating wind turbine model test WindS tar TLP dynamic response

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Cage-Ligand Strategy for the Construction of Zr_(4)(embonate)6-Based MOFs with Third-Order Nonlinear-Optical Properties

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Chinese Journal of Chemistry 2022年第17期40卷 2067-2071页

作者： Qian Teng yan-ping he Guang-Hui Chen Shu-Mei Chen State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian350002 China College of Chemistry Fuzhou UniversityFuzhouFujian350108 China

herein,we demonstrate a very useful strategy to construct cage-based metal-organic frameworks(MOFs)with third-order nonlinear-optical *** specifically,by employing the Zr_(4)L_(6)(L=embonate)cages to assembly with N-contained ligands and Mn^(2+)/Zn^(2+) ions,four Zr_(4)L_(6)-cage-based MOFs have been synthesized and structurally *** them,a 3D framework with strong aromatic π−πstacking force exhibits a good optical limiting effect.

关键词： Cage compounds N ligands Multistage assembly Structure Nonlinear optics

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Homochiral design of titanium-organic cage for circularly polarized luminescence-based molecular detection

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中国科学:化学英文版 2023年第9期66卷 2558-2562页

作者： Guang-Hui Chen yan-ping he Yinghua Yu Qiao-Hong Li Jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Post-assembly modification strategy is used as an effective approach to improve the functional applications of metal-organic cages. The active vertex of the racemic tetrahedral Ti4L6(L = embonate) cages traps four chiral diamine chelated dinuclear silver ions, obtaining homochiral cages which exhibit helical perovskite stacks. Such a surface modification engineering enables the structural precise cages presenting homochirality and circularly polarized luminescence(CPL) response, further achieving enantioselective recognition toward chiral Camphorquinone molecules and displaying enhanced temperature-dependent effects of CPL output.

关键词： chiral recognition circularly polarized luminescence post-assembly modification titanium-organic cages

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覆膜支架重建技术腔内治疗TASCⅡC/D级主髂动脉闭塞症

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湖北医药学院学报 2024年第5期43卷 524-529页

作者：周东何艳平席宇李丹彭莉湖北医药学院附属襄阳市第一人民医院普外科五区湖北襄阳441000

目的:探讨覆膜支架重建技术(covered endovascular reconstruction of aortic bifurcation,CERAB)腔内治疗TASCⅡC/D级主髂动脉闭塞症(aortoiliac occlusive disease,AIOD)临床疗效。方法:回顾性分析我科2019年12月至2022年12月应用CERAB技术治疗的23例TASCⅡC/D级AIOD患者临床资料,观察手术疗效及随访结果。结果:23例患者均成功完成手术,成功率100%,其中一期支架植入17例,6例因继发血栓行导管接触性溶栓(catheter-directed thrombolysis,CDT)后二期支架植入,平均置管溶栓时间(24.3±3.1)h,平均尿激酶使用量(83.1±16.7)U,平均手术时间(95.7±20.1)min,平均住院时间(6.5±1.9)d。踝肱指数(ankle brachial index,ABI)术后较术前明显提高(P<0.05)。23例患者均获得随访,成功率100.0%,平均随访时间(32.9±20.5)月。随访期间无截肢、死亡病例,保肢率100%。术后3、6、12个月ABI值均较术前提高(P<0.05)。结论:CERAB技术治疗TASCⅡC/D型AIOD可获得较满意的临床效果及早中期通畅率。

关键词：主髂动脉闭塞症覆膜支架重建技术球扩覆膜支架腔内治疗

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