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Experimental Study on the Sinking and Leveling of A Large-Capacity Offshore Wind Turbine Five-Bucket Foundation in Sand

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China Ocean Engineering 2024年第4期38卷 586-601页

作者： LIAN Ji-jian ZHU Hang guo yao-hua WANG Hai-jun YU Tong-shun State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation Tianjin UniversityTianjin 300072China School of Civil Engineering Tianjin UniversityTianjin 300072China Tianjin University of Technology Tianjin 300384China College of Engineering Ocean University of ChinaQingdao 266100China

As offshore wind farms expand into deeper and farther ocean regions and the unit capacity of offshore wind turbines(OWTs)increases,there is a pressing need for a new foundation structure that can accommodate deep-sea conditions and support large capacities while maintaining economical and *** meet this goal of integrated transportation and one-step installation,a novel five-bucket jacket foundation(FBJF),with its suction installation and leveling methods in sand,has been proposed,analyzed and experimentally ***,seepage failure experiments of the FBJF at various depths were conducted,and a formula for calculating the critical suction of seepage failure suitable for the FBJF in sand was chosen and recommended for use with a range of values for the permeability coefficient ***,through leveling experiments of the FBJF at different depths,the maximum adjustable leveling angle during the sinking process was defined using seepage failure and the adjustable leveling angle of the foundation as control *** leveling control strategies were proposed and ***,an automatic sinking and leveling control system for the FBJF was developed and experimentally verified for feasibility.

关键词： offshore wind turbine(OWT) bucket foundation seepage failure suction installation

Density Functional Theory Investigation of Structures and Electronic Spectra of N-protonated Corroles

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Chinese Journal of Chemical Physics 2012年第3期25卷 281-290,373页

作者： Hui-ling Gao guo-hua yao Fang Chen Wen-lou Wang Dong-ming Chen Department of Chemical Physics University of Science and Technolo&y of China Hefei 230026 China

The geometries and electronic spectra of a series of N-protonated corroles, including unsub- stituted H4Cor＋ and meso-triaryl substituted H4TPC＋, H4TpFPC＋, and H4TdCPC＋, were theoretically studied with density functional theory （DFT）. The results indicate that all these compounds have two conformers, one with C2 symmetry （denoted as Sl） is more stable than the other （denoted as $2, C1 symmetry） by 15.8-18.5 kJ/mol. The corrole macrocycles of these compounds show significant out-of-plane deformation. The enantiomerizations of the chiral S1 conformers were found to be a multi-step process with the $2 conformers as the intermediates. Electronic absorption spectra and electronic circular dichroism （ECD） of these compounds were calculated with time-dependent DFT. In comparison with H4Cor＋, the UV- Vis absorptions of meso-triaryl species are significantly red-shifted and their Q bands are enhanced due to the π-π conjugation between the aryl and corrole rings. Several neighboring electronic transitions were calculated with opposite signs in rotatory strengths, suggesting that ECD spectroscopy may be a useful tool in studying the electronic transitions of these compounds.

关键词： Corrole N-protonation Density functional theory Enantiomerization Elec-tronic spectrum

Stability Study on the Bucket Foundation with Multi-Compartment During the Floating-up Process Considering Air Compressibility

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China Ocean Engineering 2023年第6期37卷 975-988页

作者： YE Fang-di LIAN Ji-jian guo yao-hua WANG Hai-jun XIAO Tian-run XIONG Dong-zhi YU Tong-shun State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation Tianjin UniversityTianjin 300072China School of Civil Engineering Tianjin UniversityTianjin 300072China Tianjin University of Technology Tianjin 300384China College of Engineering Ocean University of ChinaQingdao 266100China

In the process of developing offshore wind power towards deeper waters,the advantages of the bucket foundation in terms of integrated construction and economy are becoming increasingly *** contrast to conventional floating bodies,the air-floating bucket foundations can achieve self-floating with the help of the air in the compartment and adjust its buoyancy and stability by controlling the air volume in the *** construction process of the bucket foundation involves the control of air in the compartment,thus making it more difficult to *** after the prefabrication of the bucket foundation,the stability of the bucket foundation at the floating-up stage is particularly *** stability of a multi-compartment bucket foundation during the floating-up process cannot be accurately evaluated as the existing theoretical method of air-floating structures does not adequately consider air *** ensure the safety of the floating-up process,a theoretical method based on the idea of intact stability has been developed to analyze the stability of the air-floating bucket foundations,which will allow accurate calculation of the righting arm for different tilt states and critical air leakage *** the same time,accuracy and feasibility of the proposed theoretical method are verified through indoor model tests and practical operation of the prototype structure during the floating-up *** addition,measures to enhance the stability of the bucket foundation are proposed through sensitivity analysis of influencing factors.

关键词： offshore wind power bucket foundation air-floating structure stability

Electromagnetically induced grating in a four-level tripod-type atomic system

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Chinese Physics B 2014年第7期23卷 429-432页

作者：董雅宾郭耀华 Department of Physics Shanxi University

An electromagnetically induced grating in a four-level tripod-type atomic system is studied theoretically. By virtue of a weak standing-wave signal field, the phase modulation effectively diffracts a weak probe field into the first-order direction. By changing the weak signal field, the diffraction of the weak probe field can be modulated in real time, and a first-order diffraction efficiency of more than 32% can be obtained with proper parameters. Such a system has a potential application in an all-optical switch controlled by a weak optical signal.

关键词： electromagnetically induced grating phase modulation first-order diffraction efficiency

正交异性钢桥面板疲劳裂纹扩展机理及数值模拟研究

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振动与冲击 2014年第14期33卷 40-47,71页

作者：朱劲松郭耀华天津大学建筑工程学院天津300072 天津大学滨海土木工程与安全教育部重点实验室天津300072

为追踪正交异性钢桥面板的疲劳裂纹扩展过程及通用的正交异性板钢桥抗疲劳设计与开裂加固提供理论指导,提出基于实桥有限元模型进行正交异性钢桥面板疲劳裂纹扩展模拟方法及流程。建立桥梁整体有限元模型进行恒活载作用下整体分析,结合... 详细信息

为追踪正交异性钢桥面板的疲劳裂纹扩展过程及通用的正交异性板钢桥抗疲劳设计与开裂加固提供理论指导,提出基于实桥有限元模型进行正交异性钢桥面板疲劳裂纹扩展模拟方法及流程。建立桥梁整体有限元模型进行恒活载作用下整体分析,结合实桥调查结果确定全桥疲劳关键部位;建立含焊接细节的疲劳关键部位精细化模型进行疲劳应力幅分析,并基于车桥耦合振动分析考虑冲击系数对应力幅影响,确定裂纹扩展方向、路径及寿命,进行疲劳裂纹扩展全过程分析;以既有大跨度斜拉桥正交异性桥面板疲劳裂纹扩展分析为例,验证该方法与计算流程的可行性、准确性,并为该桥运营期疲劳失效维修、加固提供理论依据。

关键词：正交异性钢桥面板疲劳裂纹扩展数值模拟裂纹扩展寿命

基于天棚和地棚混合阻尼的高速车辆横向减振器半主动控制

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振动与冲击 2013年第2期32卷 18-23页

作者：郭孔辉隋记魁郭耀华湖南大学汽车车身先进设计制造国家重点实验室长沙410082 吉林大学汽车动态模拟国家重点实验室长春130022

在研究抑制高速轨道车辆横向振动时,传统天棚阻尼控制方法使车体的横向振动降低的同时,却增加了转向架和轮对的横向振动,导致机车高速运行时脱轨的可能性变大,运行安全性降低。针对上述问题,在Adams/Rial中建立了轨道车辆单节拖车的整... 详细信息

在研究抑制高速轨道车辆横向振动时,传统天棚阻尼控制方法使车体的横向振动降低的同时,却增加了转向架和轮对的横向振动,导致机车高速运行时脱轨的可能性变大,运行安全性降低。针对上述问题,在Adams/Rial中建立了轨道车辆单节拖车的整车模型,利用Matlab/Simulink工具,结合天棚阻尼控制和地棚阻尼控制特点,研究了混合阻尼控制对高速列车横向振动的抑制作用。结果表明,混合天棚阻尼控制综合考虑了高速车辆运行时的舒适性和安全性,使高速车辆具有更好的综合性能。

关键词：高速车辆半主动控制天棚地棚混合阻尼控制

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煤矿救援机器人无线通信系统及布放装置研究

煤矿机械 2014年第6期35卷 47-49页

作者：郭耀华唐山学院河北唐山063008

针对井下救援时探测机器人与地面指挥中心之间通信无法快速建立的问题,提出了一种全新的自组网、高效率应急救援通信系统以及其组网方式。系统可以利用机器人运载系统,将通信中继设备放入井下关键位置,完成组网功能。对煤矿救援机器人... 详细信息

针对井下救援时探测机器人与地面指挥中心之间通信无法快速建立的问题,提出了一种全新的自组网、高效率应急救援通信系统以及其组网方式。系统可以利用机器人运载系统,将通信中继设备放入井下关键位置,完成组网功能。对煤矿救援机器人无线通信系统及其搭建方式的研究,对实现井下远距离救援及应急通信都有很重要的价值。

关键词：无线通信系统煤矿救援机器人布放装置

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带式输送机全自动液压张紧装置应用与研究

煤矿机械 2014年第5期35卷 80-82页

作者：郭耀华唐山学院河北唐山063008

带式输送机张紧装置是带式输送机重要组成部分,液压张紧装置具有安全性好,结构紧凑,自动调压以及低成本的特点。利用PLC技术与传统的液压张紧技术相结合构成了新型带式输送机全自动液压张紧装置,重点论述全自动液压张紧装置的组成、工... 详细信息

带式输送机张紧装置是带式输送机重要组成部分,液压张紧装置具有安全性好,结构紧凑,自动调压以及低成本的特点。利用PLC技术与传统的液压张紧技术相结合构成了新型带式输送机全自动液压张紧装置,重点论述全自动液压张紧装置的组成、工作原理以及系统控制过程。

关键词：带式输送机 PLC技术液压张紧装置工作原理

基于ZigBee和GPRS网络的智能变电站设备温度无线监测系统

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仪表技术与传感器 2014年第1期 79-82页

作者：郭耀华唐山学院信息工程系河北唐山063008

针对当前变电站常规测温手段实时性能差、受安装环境限制大的难题,文中提出了将ZigBee技术和GPRS网络技术运用于智能变电站设备测温系统的方案,通过传感器、ZigBee自组网技术和GPRS技术,系统实现了对变电站刀闸、母线等多个监测点温度... 详细信息

针对当前变电站常规测温手段实时性能差、受安装环境限制大的难题,文中提出了将ZigBee技术和GPRS网络技术运用于智能变电站设备测温系统的方案,通过传感器、ZigBee自组网技术和GPRS技术,系统实现了对变电站刀闸、母线等多个监测点温度的实时监测。设计中使用温度传感器和CC2430无线芯片搭建了星形无线传感器网络,网络终端通过协调器,嵌入式网关和GPRS模块将数据传送到远程的监控端,便于用户监控和查询信息,从而有效的实现了对智能变电站设备温度的远程无线监控。整个系统运行稳定、可靠,有效保证了变电站设备的正常工作。

关键词： ZigBee 变电站 GPRS 温度采集