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学者姓名：王丕光
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Abstract ：
Offshore wind turbine system (OWTs) in areas of earthquake activity are potentially threatened by a combination of earthquake, wave, and wind loads. Thus, an analytical solution of OWTs supported by monopile on visco-elastic half-space is developed to investigate the dynamic responses of OWTs subjected to the earthquake, wave, and wind loads. Firstly, the OWTs supported by monopile considering a series of coupled interactions is estab-lished, in which monopile end soil-soil viscoelastic half-space interaction is solved by static spring-damping system, monopile-soil and water interaction are solved by analytical horizontal impedance, monopile-wave interaction is solved by linear wave theory, and tower drum-wind interaction is solved by wind loads applied on the turbine blades. Then, the displacement response of OWTs supported by monopile is further obtained based on the continuity conditions between the monopile and tower drum. Finally, the present solution degenerated into a rigid foundation and verified the rationality with existing analytical and substructure methods. In addition, some critical parameters are further conducted by using the present solution. The results indicate that it is necessary to consider the couple influence of earthquake, wave, and wind loads in the design of OWTs supported by monopile.
Keyword ：
Offshore wind turbine system Offshore wind turbine system Analytical solution Analytical solution Viscoelastic half-space Viscoelastic half-space Wave and wind loads Wave and wind loads Water-monopile-soil interaction Water-monopile-soil interaction Earthquake Earthquake
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| GB/T 7714 | Huang, Yiming , Zhao, Mi , Wang, Piguang et al. Analytical solution of dynamic responses of offshore wind turbine supported by monopile under combined earthquake, wave and wind [J]. | OCEAN ENGINEERING , 2023 , 267 . |
| MLA | Huang, Yiming et al. "Analytical solution of dynamic responses of offshore wind turbine supported by monopile under combined earthquake, wave and wind" . | OCEAN ENGINEERING 267 (2023) . |
| APA | Huang, Yiming , Zhao, Mi , Wang, Piguang , Cheng, Xinglei , Du, Xiuli . Analytical solution of dynamic responses of offshore wind turbine supported by monopile under combined earthquake, wave and wind . | OCEAN ENGINEERING , 2023 , 267 . |
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Abstract ：
An analytical solution is developed to investigate the horizontal SV wave responses of end -bearing pile considering shear deformation of Timoshenko beam and soil free-field shear stress. Firstly, the beam used is a Timoshenko beam that is more in line with the ac-tual engineering project, in which taken into account the additional deflection caused by the bending and shear deformation of the pile. Meanwhile, the conditional transformation method is used to transform the coupled equation controlled by the two independent vari-ables of displacement and rotation angle in the beam model into the decoupled governing equation. Then, the impedance of the soil to the pile under horizontal SV wave is obtained based on the fixed bottom and free top boundaries of the soil, and the continuous bound-ary conditions of the pile-soil interface. Furthermore, the closed solution of the problem is obtained according to the relationship of the governing equation of Timoshenko beam, the interaction between pile and soil, and the fixed bottom and free top boundaries of the end -bearing pile. In addition, the free vibration and forced vibration of the present solution are compared with the commercial finite element software ABAQUS and the existing analytical solutions of Euler beam to verify the rationality of the present analytical solution. Finally, the influence of soil free-field shear stress and pile shear deformation are emphatically analyzed. The results have certain guiding significance for engineering structure design.(c) 2023 Elsevier Inc. All rights reserved.
Keyword ：
Horizontal SV wave Horizontal SV wave Analytical solution Analytical solution Timoshenko beam-soil interaction Timoshenko beam-soil interaction Soil free-field shear stress Soil free-field shear stress Shear deformation Shear deformation
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| GB/T 7714 | Huang, Yiming , Zhao, Mi , Wang, Piguang et al. Analytical solution of horizontal SV wave response considering pile shear deformation and soil free-field shear stress [J]. | APPLIED MATHEMATICAL MODELLING , 2023 , 119 : 295-315 . |
| MLA | Huang, Yiming et al. "Analytical solution of horizontal SV wave response considering pile shear deformation and soil free-field shear stress" . | APPLIED MATHEMATICAL MODELLING 119 (2023) : 295-315 . |
| APA | Huang, Yiming , Zhao, Mi , Wang, Piguang , Xu, Haibin , Du, Xiuli . Analytical solution of horizontal SV wave response considering pile shear deformation and soil free-field shear stress . | APPLIED MATHEMATICAL MODELLING , 2023 , 119 , 295-315 . |
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Abstract ：
For penetrating investigating the effect of foundation characteristics on the vertical vibration of a floating pile, an analytical solution of vertical vibration of a floating pile considering different types of soil foundation under vertical dynamic loads is developed. The pile is considered as Euler-Bernoulli beam, and the soil is considered as a three-dimensional axisymmetric viscoelastic medium. The soil governing equation is decoupled by introducing potential function, and utilizing the separation variables method, given the expression of soil displacement and soil impedance function. Then, further based on the boundary conditions of displacement equilibrium and stress equality between pile and soil, the expression of pile displacement is created. In addition, the frequency-domain solution for the coupling interaction of soil-soil viscoelastic half-space is derived at the same time. Furthermore, when the present analytical solution is degraded to a rigid foundation and the top of system is only subjected to vertical dynamic load, the reasonableness of the present analytical solution has been predicted by contrast with software ABAQUS and the existing analytical solution, respectively. Finally, on the basis of the present analytical solution, the differences and similarities of dynamic response of several soil foundation types to pile and soil are revealed with emphasis. Moreover, the results can provide a theoretical support for numerical analysis.
Keyword ：
Spring-damping system Spring-damping system Vertical earthquake input Vertical earthquake input Pile-soil interaction Pile-soil interaction Vertical vibration Vertical vibration Analytical solution Analytical solution
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| GB/T 7714 | Zhao, Mi , Huang, Yiming , Wang, Piguang et al. Analytical solution of vertical vibration of a floating pile considering different types of soil viscoelastic half-space [J]. | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2023 , 165 . |
| MLA | Zhao, Mi et al. "Analytical solution of vertical vibration of a floating pile considering different types of soil viscoelastic half-space" . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 165 (2023) . |
| APA | Zhao, Mi , Huang, Yiming , Wang, Piguang , Cheng, Xinglei , Du, Xiuli . Analytical solution of vertical vibration of a floating pile considering different types of soil viscoelastic half-space . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2023 , 165 . |
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Abstract ：
In this study, a numerical model for the seawater-sediment-bedrock system is proposed to evaluate the seismic responses of ocean sites under obliquely incident P-SV wsaves. First, the stiffness matrix method for the soil medium with an arbitrary angle input of seismic waves is extended to evaluate the seismic responses of the seawater-sediment-bedrock system. The wave radiation effects of the far-field domain are fully considered by the exact artificial boundary conditions. Second, the proposed model is verified by degenerated models and a nu-merical model developed by the authors, which are inapplicable to arbitrary-angle inputs of seismic waves. Third, the effects of site properties, including the porosity and permeability of the seabed, incident angle and depth of seawater, on the peak response of the sediment layer under obliquely incident P and SV waves are analysed. The results are conducive to understanding the seismic responses of ocean sites.
Keyword ：
Seawater-sediment-bedrock system Seawater-sediment-bedrock system Stiffness matrix method Stiffness matrix method Obliquely incident Obliquely incident Seismic response Seismic response
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| GB/T 7714 | Zhao, Mi , Hu, Songmin , Wang, Piguang et al. Analysis of seawater-sediment-bedrock interaction model under obliquely incident P-SV waves with arbitrary angles [J]. | APPLIED OCEAN RESEARCH , 2023 , 130 . |
| MLA | Zhao, Mi et al. "Analysis of seawater-sediment-bedrock interaction model under obliquely incident P-SV waves with arbitrary angles" . | APPLIED OCEAN RESEARCH 130 (2023) . |
| APA | Zhao, Mi , Hu, Songmin , Wang, Piguang , Zhang, Chao , Zhang, Guoliang , Du, Xiuli . Analysis of seawater-sediment-bedrock interaction model under obliquely incident P-SV waves with arbitrary angles . | APPLIED OCEAN RESEARCH , 2023 , 130 . |
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Abstract ：
Vortex-induced vibrations (VIVs) of a flexible cylinder subjected to multi-directional flows have been studied based on a wake oscillator model. The multi-directional flow comprises two slabs of flows in different directions, with each slab having a uniform uni-directional profile. The dynamics of the flexible cylinder is described based on the linear Euler-Bernoulli beam theory, and a wake oscillator model is uniformly distributed along the cylinder to model the hydrodynamic force acting on it. The dynamics of the coupled system has been solved numerically using the finite element method, and simulations have been conducted with the cylinder subjected to multi-directional flows with different angles between the two slabs. A large number of different initial conditions have been applied, and more than one steady-state response has been captured. The steady-state responses exhibit two different patterns: one is characterized by two waves traveling in opposite directions, while the other is dominated by a single traveling wave. The cross-flow VIV primarily occurs in the local cross-flow direction, and a transition of its vibrating direction happens at the interface of the two flows. Such transition is not observed in the inline VIV, and significant vibrations at the double frequency appear in both local cross-flow and inline directions. Energy analysis shows that this transition is boosted by a specific energy transfer pattern between the structure and the flow, which excites the vibration of the cylinder in some directions while damps it in others.
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| GB/T 7714 | Qu, Yang , Wang, Piguang , Fu, Shixiao et al. Numerical study on vortex-induced vibrations of a flexible cylinder subjected to multi-directional flows [J]. | PHYSICS OF FLUIDS , 2023 , 35 (3) . |
| MLA | Qu, Yang et al. "Numerical study on vortex-induced vibrations of a flexible cylinder subjected to multi-directional flows" . | PHYSICS OF FLUIDS 35 . 3 (2023) . |
| APA | Qu, Yang , Wang, Piguang , Fu, Shixiao , Zhao, Mi . Numerical study on vortex-induced vibrations of a flexible cylinder subjected to multi-directional flows . | PHYSICS OF FLUIDS , 2023 , 35 (3) . |
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Abstract ：
Vortex-induced vibrations (VIVs) of a top tensioned riser (TTR) subjected to flows with spanwise varying directions have been simulated and studied in this paper. The riser is simplified as an Euler-Bernoulli beam and its dynamics is described using the finite element method with the Absolute Nodal Coordinate Formulation (ANCF). The hydrodynamic forces due to vortex shedding are modelled with wake oscillators attached to nodes along the riser. The model has been firstly used to simulate an experiment and acceptable model results have been obtained in comparison with the measurements. Then, the VIVs of the TTR under two flow conditions, one with uniform and the other with linearly sheared velocity, have been simulated. In both cases, the direction of the flow varies linearly along the riser. Simulation results have shown different response characteristics at small and high flow velocities with respect to the frequency, amplitude and vibrating direction of the riser. In general, at a small flow velocity where the response of the riser is dominated by the standing wave, the variation in the flow direction has a major influence on the VIV of the riser. However, when the travelling wave is predominant at a high flow velocity, the effect of the spanwise varying flow direction is insignificant. The energy transfer between the structure and flow has been studied to reveal the possible mechanism that leads to these differences in the responses of the riser at small and high flow velocities. The results of the present paper suggest that the engineering simplification of ignoring the influence of flow direction variation on VIV may only be applicable at high flow velocities when the response of the riser is dominated by the travelling wave.
Keyword ：
Multi-directional flow Multi-directional flow Vortex-induced vibration Vortex-induced vibration Riser Riser Wake oscillator model Wake oscillator model Fluid-structure interaction Fluid-structure interaction
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| GB/T 7714 | Qu, Yang , Wang, Piguang , Fu, Shixiao et al. Vortex-induced vibrations of a top tensioned riser subjected to flows with spanwise varying directions [J]. | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES , 2023 , 242 . |
| MLA | Qu, Yang et al. "Vortex-induced vibrations of a top tensioned riser subjected to flows with spanwise varying directions" . | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES 242 (2023) . |
| APA | Qu, Yang , Wang, Piguang , Fu, Shixiao , Zhao, Mi . Vortex-induced vibrations of a top tensioned riser subjected to flows with spanwise varying directions . | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES , 2023 , 242 . |
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Abstract ：
基于有限元软件ABAQUS平台,建立了非匀质饱和黏土场地的海上风电桩–筒复合基础数值计算模型,对比研究竖向荷载V、水平荷载H和弯矩荷载M作用下不同筒结构尺寸的桩–筒复合基础的承载力系数,并采用正交试验法开展桩–筒复合基础的各向承载性能的影响因素研究.结果表明,饱和黏土的非匀质特性系数K对竖向承载力系数NcV影响较小;K对水平承载力系数NcH和抗弯承载力系数NcM的影响呈指数型递减.筒结构直径D和入土深度L对各向承载力系数的影响存在交互作用.D对桩–筒复合基础承载力系数的影响最大,可以通过增加筒结构直径从而有效地提高桩–筒复合基础的承载性能.研究结果为海上风电桩–筒复合基础的设计提供了依据.
Keyword ：
海上风电 海上风电 桩—筒复合基础 桩—筒复合基础 正交试验 正交试验 承载力系数 承载力系数 非匀质饱和黏土 非匀质饱和黏土
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| GB/T 7714 | 孙艳国 , 许成顺 , 杜修力 et al. 海上风电桩–筒复合基础承载性能研究 [J]. | 工程科学学报 , 2023 , 45 (3) : 489-498 . |
| MLA | 孙艳国 et al. "海上风电桩–筒复合基础承载性能研究" . | 工程科学学报 45 . 3 (2023) : 489-498 . |
| APA | 孙艳国 , 许成顺 , 杜修力 , 王丕光 , 席仁强 , 孙毅龙 . 海上风电桩–筒复合基础承载性能研究 . | 工程科学学报 , 2023 , 45 (3) , 489-498 . |
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Abstract ：
无限域吸收边界和爆炸波输入是水下爆炸载荷数值模拟的两个关键问题. 本文借鉴基于内部子结构的地震波动输入方法和爆源子结构多尺度分析方法, 考虑水下爆炸载荷与地震载荷同属于波动问题, 提出一种水下爆炸作用下爆源子结构的爆炸波输入方法, 该方法首先通过对爆源区域进行水下爆炸波自由场的波场分解, 并利用地震波的内部子结构输入方法, 将该自由波场运动转换为等效爆炸波输入载荷, 从而实现了水下爆炸问题中冲击波的输入; 本文采用圆形爆源子结构区域, 并采用AUTODYN软件中一维自由场模型计算水下爆炸作用下该区域的自由波场压力时程. 进一步, 基于连分式近似方法提出了一种模拟无限域水体辐射效应的高精度时域人工边界条件, 该吸收边界可设置于离结构和爆源子结构较近处. 本文提出的分析方法通过圆形爆源子结构进行水下爆炸载荷的转化, 并采用高精度吸收边界大大减少计算区域, 既保证了计算精度, 又降低了单元数量, 具有较高的计算效率和较强的实用性. 通过数值算例分析, 验证了本文模型与方法的准确性, 模拟了水下爆炸作用下的冲击波和气泡脉动阶段测点的压力时程曲线, 并研究了圆形结构对水下近场爆炸波散射效应的影响规律.
Keyword ：
水下爆炸 水下爆炸 水−结构相互作用 水−结构相互作用 人工边界条件 人工边界条件 爆源子结构 爆源子结构 散射 散射
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| GB/T 7714 | 王丕光 , 卢冉冉 , 闫秋实 et al. 水下爆炸作用下基于声学的爆源子结构输入方法 [J]. | 力学学报 , 2023 , 55 (4) : 915-924 . |
| MLA | 王丕光 et al. "水下爆炸作用下基于声学的爆源子结构输入方法" . | 力学学报 55 . 4 (2023) : 915-924 . |
| APA | 王丕光 , 卢冉冉 , 闫秋实 , 李述涛 , 杜修力 . 水下爆炸作用下基于声学的爆源子结构输入方法 . | 力学学报 , 2023 , 55 (4) , 915-924 . |
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Abstract ：
中国大多数海洋场地存在上覆软弱地层,这种海床特性对海上风电场建设十分不利.为研究上覆软黏土层对新型桩-筒复合基础承载性能的影响,基于有限元软件ABAQUS,建立不同厚度的上覆软黏土层场地中桩-筒复合基础数值分析模型,分别对桩-筒复合基础施加单向荷载(V、H、M)和复合荷载(H-M),研究上覆软黏土层厚度对各向极限承载力、桩-筒复合基础中各结构荷载分担比以及初始刚度kinit的影响.结果表明:桩-筒复合基础各向极限承载力随着上覆软黏土层厚度的增加而减小,当上覆软黏土层厚度等于筒结构入土深度(b=6 m)时,桩-筒复合基础的竖向极限承载力降低了12.86％,水平极限承载力降低了46.55％,抗弯极限承载力降低了34.86％;桩-筒复合基础的初始刚度kinit随着上覆软黏土层厚度的增加而减小.海上风电桩-筒复合基础的设计应充分考虑上覆软黏土层对承载特性的影响.
Keyword ：
上覆软黏土层 上覆软黏土层 桩-筒复合基础 桩-筒复合基础 降低率 降低率 海上风机 海上风机 荷载分担比 荷载分担比 初始刚度 初始刚度
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| GB/T 7714 | 孙艳国 , 许成顺 , 杜修力 et al. 上覆软黏土层对桩-筒复合基础承载性能的影响 [J]. | 哈尔滨工业大学学报 , 2023 , 55 (2) : 108-116 . |
| MLA | 孙艳国 et al. "上覆软黏土层对桩-筒复合基础承载性能的影响" . | 哈尔滨工业大学学报 55 . 2 (2023) : 108-116 . |
| APA | 孙艳国 , 许成顺 , 杜修力 , 豆鹏飞 , 王丕光 , 孙毅龙 . 上覆软黏土层对桩-筒复合基础承载性能的影响 . | 哈尔滨工业大学学报 , 2023 , 55 (2) , 108-116 . |
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Abstract ：
In marine environment, the monopile offshore wind turbines (MOWTs) are subjected to long-term horizontal cyclic loads caused by wind, waves and currents, which will lead to the stiffness degradation and plastic cumulative deformation of clays. The decrease of clays bearing capacity caused by long-term cyclic degradation effect is a threat to the safe use of MOWTs in earthquake-prone countries (such as some countries in the circumPacific seismic belt). A three-dimensional finite element model is established to research the seismic response analysis of MOWT in clays considering the long-term cyclic degradation effect. The cumulative deformation of pile-soil system after long-term cycle are obtained by adopting the stiffness degradation of clays through the USDFLD subroutine. On this basis, the dynamic response analysis of MOWT system under the combined action of seismic and environmental loads is carried out. The influence of long-term horizontal cyclic load number, longterm horizontal cyclic load amplitude, seismic intensity, soil strength, environmental loads and cyclic degradation parameter on the dynamic response of MOWT is analyzed. In the seismic design of MOWTs, the effects of long-term degradation and random wind, waves and other environmental loads should be considered.
Keyword ：
Offshore wind turbine Offshore wind turbine Monopile Monopile Clays Clays Long -term cyclic loading Long -term cyclic loading Stiffness degradation Stiffness degradation Seismic response Seismic response
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| GB/T 7714 | Zhang, Xiao-ling , Li, Yun-qi , Cheng, Xing-lei et al. Seismic responses analysis of monopile offshore wind turbines in clays considering the long-term cyclic degradation effect [J]. | OCEAN ENGINEERING , 2023 , 285 . |
| MLA | Zhang, Xiao-ling et al. "Seismic responses analysis of monopile offshore wind turbines in clays considering the long-term cyclic degradation effect" . | OCEAN ENGINEERING 285 (2023) . |
| APA | Zhang, Xiao-ling , Li, Yun-qi , Cheng, Xing-lei , Wang, Pi-guang , Du, Xiu-li . Seismic responses analysis of monopile offshore wind turbines in clays considering the long-term cyclic degradation effect . | OCEAN ENGINEERING , 2023 , 285 . |
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