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学者姓名：王丕光
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摘要 ：
An increasing number of civil structures are being built near or across earthquake faults, making them more susceptible to severe seismic damage due to the presence of large velocity pulses in near-fault ground motions (NFGMs). Because of limited availability of NFGMs records, synthesized NFGMs are necessary for seismic designing of structures located around near-fault areas. Based on the far-field synthesis of ground motions (GMs), various methods for synthesizing NFGMs by superimposing high-frequency and low-frequency components in the time domain have been developed. However, such techniques suffer from wider variation in the response spectrum between the synthesized NFGMs and the target spectrum. To address this issue, a new approach for synthesizing NFGMs has been proposed. This approach investigates key parameters of the response spectrum for NFGMs based on a comprehensive database. Similarly, the shortcomings in existing NFGM methods have been analyzed by evaluating a couple of criteria for the suitability of the synthesizing method. Two adjustment strategies have been developed to attain consistency in the response spectrum. The spectral characteristics can be maintained during the spectrum adjustment process to overcome limitations of existing methods. Synthesized specimen of NFGMs has been utilized to validate the effectiveness of the proposed approach.
关键词 ：
Near-fault ground motions (NFGMs) Near-fault ground motions (NFGMs) Pulse-like Pulse-like Response spectrum (RS) Response spectrum (RS) Improved methods Improved methods High-frequency components High-frequency components
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| GB/T 7714 | Zhang, Chao , Wu, Cheng , Wang, Piguang et al. Improved methods for synthesizing near-fault ground motions based on specific response spectrum [J]. | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2024 , 183 . |
| MLA | Zhang, Chao et al. "Improved methods for synthesizing near-fault ground motions based on specific response spectrum" . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 183 (2024) . |
| APA | Zhang, Chao , Wu, Cheng , Wang, Piguang , Li, Dong , Lu, Jianbin . Improved methods for synthesizing near-fault ground motions based on specific response spectrum . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2024 , 183 . |
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摘要 ：
A 5-MW wind turbine has been modeled and analyzed for fluid-structure interaction and aerodynamic performance. In this study, a full-scale model of a 5-MW wind turbine is first developed based on a computational fluid dynamics (CFD) approach, in which the unsteady, noncompressible Reynolds Averaged Navier-Stokes (RANS) method is used. The main focus of the study is to analyze the tower shadow effect on the aerodynamic performance of the wind turbine under different inlet flow conditions. Subsequently, the finite element model is established by considering fluid/structure interactions to study the structural stress, displacement, strain distributions and flow field information of the structure under the uniform wind speed. Finally, the fluid-structure interaction model is established by considering turbulent wind and the tower shadow effect. The variation rules of the dynamic response of the one-way and two-way fluid-structure interaction (FSI) models under different wind speeds are analyzed, and the numerical calculation results are compared with those of the centralized mass model. The results show that the tower shadow effect and structural deformation are the main factors affecting the aerodynamic load fluctuation of the wind turbine, which in turn affects the aerodynamic performance and structural stability of the blades. The structural dynamic response of the coupled model shows significant similarity, while the structural displacement response of the former exhibits less fluctuation compared with the conventional centralized mass model. The one-way fluid-structure interaction (FSI) model shows a higher frequency of stress-strain and displacement oscillations on the blade compared with the two-way FSI model.
关键词 ：
computational fluid dynamics methods (CFD) computational fluid dynamics methods (CFD) tower shadow effect tower shadow effect aerodynamic performance aerodynamic performance fluid-structure interaction fluid-structure interaction space flow field space flow field
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| GB/T 7714 | Zhao, Mi , Yu, Wan-li , Wang, Pi-guang et al. Numerical Study on the Aerodynamic and Fluid-Structure Interaction of An NREL-5MW Wind Turbine [J]. | CHINA OCEAN ENGINEERING , 2024 , 38 (3) : 363-378 . |
| MLA | Zhao, Mi et al. "Numerical Study on the Aerodynamic and Fluid-Structure Interaction of An NREL-5MW Wind Turbine" . | CHINA OCEAN ENGINEERING 38 . 3 (2024) : 363-378 . |
| APA | Zhao, Mi , Yu, Wan-li , Wang, Pi-guang , Qu, Yang , Du, Xiu-li . Numerical Study on the Aerodynamic and Fluid-Structure Interaction of An NREL-5MW Wind Turbine . | CHINA OCEAN ENGINEERING , 2024 , 38 (3) , 363-378 . |
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摘要 ：
A mathematical model is proposed to investigate the dynamic behavior of an end-bearing pile under vertical seismic loading in a water-pile-saturated soil system. The model is based on the Euler-Bernoulli beam theory and takes into account the stress balance between pile sections, representing the pile as a one-dimensional rod. The overall response of site is divided into two components: the free-field response and the scattered-field response. The pile and soil are considered as linearly viscoelastic materials with hysteresis-based damping, while water is modeled as a linear acoustic medium. By accounting for boundary conditions involving force equilibrium and displacement continuity at the pile-soil and water-soil interfaces, an analytical solution for the system response is derived. Analytical expressions of pore water pressure and displacements are obtained, on the basis of considering water-soil interaction in both fields. A parameterization study is then conducted to evaluate the impact of key parameters on the vibration characteristics of piles in a water-pile-saturated soil system.
关键词 ：
Saturated soil Saturated soil Pile-soil interaction Pile-soil interaction Analytical solution Analytical solution Water-soil interaction Water-soil interaction Vertical earthquake Vertical earthquake
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| GB/T 7714 | Wang, Piguang , Wang, Baoxin , Dong, Zhenhua et al. An analytical solution for vertical seismic response of an end-bearing pile in saturated soil considering pile-soil and free and scattered field water-soil interaction [J]. | MARINE STRUCTURES , 2024 , 98 . |
| MLA | Wang, Piguang et al. "An analytical solution for vertical seismic response of an end-bearing pile in saturated soil considering pile-soil and free and scattered field water-soil interaction" . | MARINE STRUCTURES 98 (2024) . |
| APA | Wang, Piguang , Wang, Baoxin , Dong, Zhenhua , Cheng, Xinglei , Du, Xiuli . An analytical solution for vertical seismic response of an end-bearing pile in saturated soil considering pile-soil and free and scattered field water-soil interaction . | MARINE STRUCTURES , 2024 , 98 . |
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摘要 ：
本发明公开了一种双向内置式风力发电机阻尼放大传递系统，涉及风力发电技术领域，放置于风力发电机的塔筒内，包括若干顶部固定件、拉索、底部固定件、三角桁架、阻尼器、铰接柱和底座，底座固定在地面上，铰接柱的底部与底座铰接，铰接柱的顶部四周与三角桁架刚性连接，三角桁架的锐角端向外延伸并通过阻尼器与底部固定件相连接，阻尼器位于三角桁架的下方，底部固定件与塔筒的底端内壁固定连接，顶部固定件与塔筒的顶端内壁固定连接，顶部固定件通过拉索与三角桁架的顶面中部相连接。本发明采用上述结构的一种双向内置式风力发电机阻尼放大传递系统，构造简单，具有显著的耗能减振作用。
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| GB/T 7714 | 王萌 , 刘超 , 王丕光 et al. 一种双向内置式风力发电机阻尼放大传递系统 : CN202311069328.4[P]. | 2023-08-23 . |
| MLA | 王萌 et al. "一种双向内置式风力发电机阻尼放大传递系统" : CN202311069328.4. | 2023-08-23 . |
| APA | 王萌 , 刘超 , 王丕光 , 杜修力 . 一种双向内置式风力发电机阻尼放大传递系统 : CN202311069328.4. | 2023-08-23 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种风力发电机双向负刚度阻尼增效系统，涉及风力发电机技术领域，包括伸臂牛腿、拉索、支撑梁、预压弹簧、伸臂桁架、铰接柱、底座、阻尼器和铰支座，借助伸臂牛腿将风机塔筒上部转动变形转化为伸臂牛腿端部竖向位移，实现第一重放大效应；伸臂牛腿端部竖向位移借助拉索传递带动铰接柱绕底部的底座转动，进而转化为更大的伸臂桁架端部竖向位移，实现第二重放大效应；铰接柱转动带动预压弹簧转动，从而释放预压弹簧的预压力，并推动铰接柱和伸臂桁架进一步向着转动方向运动，产生了负刚度力，进一步地放大阻尼器的变形，实现第三重放大效应。本发明能够有效控制外部荷载作用下风机任意水平方向的不利振动，便于安装于风机塔筒内部。
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| GB/T 7714 | 王萌 , 刘超 , 王丕光 et al. 一种风力发电机双向负刚度阻尼增效系统 : CN202311107754.2[P]. | 2023-08-31 . |
| MLA | 王萌 et al. "一种风力发电机双向负刚度阻尼增效系统" : CN202311107754.2. | 2023-08-31 . |
| APA | 王萌 , 刘超 , 王丕光 , 杜修力 . 一种风力发电机双向负刚度阻尼增效系统 : CN202311107754.2. | 2023-08-31 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种宽流速多流向双向涡激振动俘能装置和方法，其中装置包括，竖直定轴、可绕定轴旋转的水平的悬臂和竖直俘能柱体。悬臂和定轴之间通过扭转弹簧连接。悬臂沿长度方向设有导轨滑块组件，上面垂直于悬臂悬挂俘能柱体，俘能柱体可以沿悬臂长度方向振动。整个装置包含悬臂绕定轴的转动自由度和俘能柱体沿悬臂长度方向的平移自由度。定轴底部装有驱动电机可以带动定轴旋转改变悬臂方向。此方案可以激发横流和顺流双向涡激振动，其俘能效率更高。同时，流速和流向发生变化时，该方案可以通过旋转定轴调整悬臂和来流之间的夹角，调整俘能柱体在横流方向上的自振频率使其和涡泄频率保持一致，从而有更宽的流速流向俘能范围。
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| GB/T 7714 | 曲杨 , 王丕光 , 徐浩然 et al. 一种宽流速多流向双向涡激振动俘能装置和方法 : CN202310600286.6[P]. | 2023-05-25 . |
| MLA | 曲杨 et al. "一种宽流速多流向双向涡激振动俘能装置和方法" : CN202310600286.6. | 2023-05-25 . |
| APA | 曲杨 , 王丕光 , 徐浩然 , 赵密 . 一种宽流速多流向双向涡激振动俘能装置和方法 : CN202310600286.6. | 2023-05-25 . |
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摘要 ：
Tripod suction bucket foundation is increasingly used to support offshore wind turbines (OWTs) due to its convenient and low-cost installation and high overturning resistance. However, the seismic response charac-teristics of OWTs of tripod bucket foundations in sands is not well covered in the literature. Therefore, this study investigates the response of tripod bucket foundations installed in sands and subjected to seismic loads employing advanced three-dimensional finite difference analysis. The variation of pore pressure around suction bucket is evaluated, and the failure mechanism of the tripod bucket foundation in sands is revealed. In addition, the displacement response of the tower, and the acceleration amplification effect of the OWT system are elucidated. It is found that the earthquake magnitude, and sand relative density and liquefaction greatly affect the foundation seismic behavior. The results revealed that the overall rotation of the tripod bucket foundation is primarily due to progressively increasing differential vertical settlement between the foundation sides of 'single bucket' and 'double bucket' associated with loading direction. It was also found that the sand liquefaction under strong shaking may lead to excessive rotation of the foundation that exceeds the service limit state. The findings from this study can provide guidance for the design of OWT tripod bucket foundations in sands.
关键词 ：
Sands Sands Seismic loads Seismic loads Tripod suction bucket Tripod suction bucket Liquefaction Liquefaction Offshore wind turbine Offshore wind turbine
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| GB/T 7714 | Cheng, Xinglei , Li, Yang , Mu, Kun et al. Seismic response of tripod suction bucket foundation for offshore wind turbine in sands [J]. | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2023 , 177 . |
| MLA | Cheng, Xinglei et al. "Seismic response of tripod suction bucket foundation for offshore wind turbine in sands" . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 177 (2023) . |
| APA | Cheng, Xinglei , Li, Yang , Mu, Kun , El Naggar, M. Hesham , Zhou, Yadong , Wang, Piguang et al. Seismic response of tripod suction bucket foundation for offshore wind turbine in sands . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2023 , 177 . |
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摘要 ：
The influence of the vertical and horizontal impedances of soil radial heterogeneity was studied theoretically based on the series convergence and transfer matrix methods. The soil around the pile was assumed to be composed of two homogeneous soil zones in three-dimensional axisymmetric space, that is, a disturbed inner boundary zone and an outer semi-infinite undisturbed zone. Moreover, the shear moduli of the inner perturbed and the outer unperturbed zones were correlated with a specific parabolic function. Then, the soil vertical and horizontal impedances in the radially inhomogeneous boundary zone were derived based on the series convergence and transfer matrix methods using the stress and displacement continuity conditions and the infinite boundary condition. Finally, the impedance errors and applicable range of two methods are discussed. The main findings can be categorized as: (1) when analysing a soil radial heterogeneous site, the influence of the shear modulus ratio of the inner and outer zones, the ratio of the thickness of boundary zone to the pile radius, soil density and pile radius should be taken into account; (2) when 0.8 <= G(i)/G(0) <= 1.0 and 1 <= t(m)/r(0) <= 4, the error between the series convergence method and transfer matrix method is within 10%, while the error is approximately 15% when 0.4 <= G(i)/G(0 )<= 0.7.
关键词 ：
Pile-soil interaction Pile-soil interaction Transfer matrix method Transfer matrix method Series convergence method Series convergence method Soil radial heterogeneity Soil radial heterogeneity Analytical solution Analytical solution
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| GB/T 7714 | Huang, Yiming , Zhao, Mi , Wang, Piguang et al. Analytical Study on the Impedance of Radial Heterogeneous Viscoelastic Soil with Two Different Methods [J]. | ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING , 2023 . |
| MLA | Huang, Yiming et al. "Analytical Study on the Impedance of Radial Heterogeneous Viscoelastic Soil with Two Different Methods" . | ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING (2023) . |
| APA | Huang, Yiming , Zhao, Mi , Wang, Piguang , Cheng, Xinglei , Du, Xiuli . Analytical Study on the Impedance of Radial Heterogeneous Viscoelastic Soil with Two Different Methods . | ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING , 2023 . |
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摘要 ：
Tripod pile foundation is pursued as an efficient foundation system for offshore wind turbines (OWTs) installed in deeper waters (20-50m). In this application, the foundations would be subjected to dynamic loads including due to wind, waves, and earthquakes. This paper presents a numerical method for analyzing the dynamic responses of tripod pile foundation installed in clay based on a simplified bounding surface model to capture the clay stiffness degradation. Their behaviors under lateral monotonic, cyclic and seismic loads were investigated, and their bearing mechanism was analyzed. The results revealed that the loading direction significantly affects the ultimate bearing capacity of tripod pile foundation as the foundation capacity results from either a Pile A in tension and a Pile B in compression or vice versa. The evolution of axial force, bending moment and lateral displacement profiles of the Pile A and Pile B with the number of cycles exhibit different characteristics under lateral one-way and two-way cyclic loading. The foundation experiences cumulative rotation angles toward the Pile A side under seismic load due to the lower vertical bearing capacity of the Pile A compared to the Pile B. The tower top experiences the maximum lateral displacement and rotation angle, and the top of tripod support experiences the maximum bending moment. These findings should be considered in the design of OWT tripod pile foundations.
关键词 ：
Clays Clays Tripod pile foundation Tripod pile foundation Offshore wind turbine Offshore wind turbine Seismic loading Seismic loading Cyclic loading Cyclic loading Lateral loading Lateral loading
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| GB/T 7714 | Cheng, Xinglei , Li, Maolin , Ma, Chao et al. Dynamic analysis of tripod pile foundation in clays for offshore wind turbines [J]. | OCEAN ENGINEERING , 2023 , 287 . |
| MLA | Cheng, Xinglei et al. "Dynamic analysis of tripod pile foundation in clays for offshore wind turbines" . | OCEAN ENGINEERING 287 (2023) . |
| APA | Cheng, Xinglei , Li, Maolin , Ma, Chao , El Naggar, M. Hesham , Wang, Piguang , Sun, Xiaohan . Dynamic analysis of tripod pile foundation in clays for offshore wind turbines . | OCEAN ENGINEERING , 2023 , 287 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Offshore wind turbines (OWTs) are subject to the combined action of dynamic environmental loads including wind, waves, and earthquake loads. This paper proposes an analytical solution for the dynamic response of OWTs supported by pipe pile in heterogeneous viscoelastic soil. The analytical model accounts for various interactions that affect OWTs dynamic response. The pipe pile-internal soil is calculated by utilizing the Helmholtz method, the pipe pile-external soil is calculated by utilizing the transfer matrix method, the pipe pile-wave is evaluated by utilizing the diffraction wave theory, and the tower drum-wind is calculated by utilizing the Bernoulli method. The dynamic responses of the pipe pile and tower are established by enforcing the boundary conditions of the displacement continuity and stress equilibrium. The developed analytical solution is degenerated into simplified analytical solutions under various conditions, which was validated by comparing its predictions with the results of available numerical and analytical solutions. The validated simplified solution is then utilized investigate the effects of some critical parameters on OWTs response. The results show that the OWTs response under the combined action of earthquake, wave and wind loads is strongly affected by the presence of water and soil inside the pipe pile, soil radial heterogeneity.
关键词 ：
Pipe pile-soil interaction Pipe pile-soil interaction Offshore wind turbine Offshore wind turbine Earthquake Earthquake Analytical solution Analytical solution Wave and wind loads Wave and wind loads Pipe pile-water interaction Pipe pile-water interaction
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| GB/T 7714 | Huang, Yiming , Wang, Piguang , Zhao, Mi et al. Analytical solution for dynamic responses of offshore wind turbines supported by pipe pile in radially heterogeneous soil [J]. | OCEAN ENGINEERING , 2023 , 288 . |
| MLA | Huang, Yiming et al. "Analytical solution for dynamic responses of offshore wind turbines supported by pipe pile in radially heterogeneous soil" . | OCEAN ENGINEERING 288 (2023) . |
| APA | Huang, Yiming , Wang, Piguang , Zhao, Mi , Naggar, M. Hesham El , Du, Xiuli . Analytical solution for dynamic responses of offshore wind turbines supported by pipe pile in radially heterogeneous soil . | OCEAN ENGINEERING , 2023 , 288 . |
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