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学者姓名：王丕光
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Abstract ：
The dynamic responses of water-pile-soil system subjected to horizontal earthquakes considering seabed flexibility on hydrodynamic pressures is investigated in this paper. The hydrodynamic pressure on the pile is obtained by the inviscid compressible fluid theory and the absorption of pressure waves due to the seabed flexibility is modeled by using a reflection coefficient which is frequency independent. The horizontal resistance of the soil is obtained based on the viscoelastic dynamic continuum model. Based on the analytical solution for the seismic responses of the free-field soil, the numerical model for the seismic response of the pile is developed by using the finite element method. Parametric studies are further conducted to illustrate the influence of seabed flexibility on the seismic responses of the pile.
Keyword ：
Seabed flexibility Seabed flexibility Water-pile-soil interaction Water-pile-soil interaction Seismic response Seismic response Horizontal earthquakes Horizontal earthquakes Finite element method Finite element method
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| GB/T 7714 | Wang, Piguang , Wang, Baoxin , Cheng, Xinglei et al. Effects of seabed flexibility on the seismic responses of offshore piles considering water-pile-soil interaction [J]. | OCEAN ENGINEERING , 2024 , 308 . |
| MLA | Wang, Piguang et al. "Effects of seabed flexibility on the seismic responses of offshore piles considering water-pile-soil interaction" . | OCEAN ENGINEERING 308 (2024) . |
| APA | Wang, Piguang , Wang, Baoxin , Cheng, Xinglei , Dong, Zhenhua , Zhao, Mi , Du, Xiuli . Effects of seabed flexibility on the seismic responses of offshore piles considering water-pile-soil interaction . | OCEAN ENGINEERING , 2024 , 308 . |
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Abstract ：
The study highlights the critical factors and findings regarding bridge damage susceptibility during typhoons and hurricanes, primarily due to extreme waves, scour, and storm surges. While existing research has extensively studied bridges' responses to either extreme waves or scour individually, their combined effects have not been sufficiently explored. Experiments were conducted on a scaled two-span bridge to examine its behavior under simultaneous wave and scour conditions. Results from these experiments indicate that as scour depth increases, there is a corresponding escalation in displacement of the bridge pier, acceleration of the bearing platform, and strain along the pile foundation. To further investigate these dynamics, fluid-structure interaction analysis was employed, revealing significant insights. Notably, the study found that wave height exerts a substantial influence on wave load. For instance, at a wave height of 6 m, the average peak horizontal wave load on bridge piers was 2.48 times higher than at 3 m wave height. Moreover, local scour was identified as a critical factor reducing the bearing capacity of pile foundations, thereby significantly impacting the bridge's dynamic response to nonlinear waves. Under identical wave conditions, varying scour depths (3 m, 6 m, 9 m, and 12 m) resulted in increases in peak lateral displacements at the pier top compared to non-scouring conditions. The study concludes by emphasizing the increasing risk posed to pile foundations with deeper scour depths, particularly under stronger wave conditions. Consequently, there is a crucial need to enhance the resilience of offshore bridges against these dual hazards through advanced design and protective measures.
Keyword ：
Costal continuous beam bridge Costal continuous beam bridge Dynamic response Dynamic response Local scour Local scour Multiple hazards Multiple hazards Nonlinear wave Nonlinear wave
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| GB/T 7714 | Guo, Xuan , Zhang, Zheyu , Wang, PiGuang . Study of the dynamic response of an offshore continuous beam bridge under nonlinear wave and scour [J]. | APPLIED OCEAN RESEARCH , 2024 , 153 . |
| MLA | Guo, Xuan et al. "Study of the dynamic response of an offshore continuous beam bridge under nonlinear wave and scour" . | APPLIED OCEAN RESEARCH 153 (2024) . |
| APA | Guo, Xuan , Zhang, Zheyu , Wang, PiGuang . Study of the dynamic response of an offshore continuous beam bridge under nonlinear wave and scour . | APPLIED OCEAN RESEARCH , 2024 , 153 . |
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Abstract ：
In the present paper, the effects of external disturbances on cross-flow vortex-induced vibrations (VIVs) of a top tensioned riser are investigated based on a wake oscillator model. Two different flow conditions, namely uniform and linearly sheared profiles, and different combinations of disturbance frequency and amplitude were considered. Simulation results showed that synchronization between VIV and disturbance can occur when the disturbance frequency approaches the Strouhal frequency or when the disturbance amplitude is significant. This synchronization leads to a significant increase in riser response and the commonly used industry practice of simulating VIV and disturbance independently and summing both could underestimate the actual fatigue rate in such condition. However, in certain cases where VIV did not lock onto the disturbance, it was found that the disturbance could suppress the VIV and the industry practice tends to overestimate the fatigue rate.
Keyword ：
Riser Riser Fatigue Fatigue Wake oscillator Wake oscillator Vortex-induced vibration Vortex-induced vibration Disturbance Disturbance
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| GB/T 7714 | Qu, Yang , Fu, Shixiao , Wang, Piguang et al. Cross-flow vortex-induced vibrations of a top tensioned riser subjected to boundary disturbances with frequencies close to vortex shedding [J]. | APPLIED OCEAN RESEARCH , 2023 , 138 . |
| MLA | Qu, Yang et al. "Cross-flow vortex-induced vibrations of a top tensioned riser subjected to boundary disturbances with frequencies close to vortex shedding" . | APPLIED OCEAN RESEARCH 138 (2023) . |
| APA | Qu, Yang , Fu, Shixiao , Wang, Piguang , Zhao, Mi , Yi, Peng . Cross-flow vortex-induced vibrations of a top tensioned riser subjected to boundary disturbances with frequencies close to vortex shedding . | APPLIED OCEAN RESEARCH , 2023 , 138 . |
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Abstract ：
This paper investigated the vibration control problem of jacket offshore wind turbines (JOWTs) caused by multi-hazards including winds, waves, and earthquakes through amplifying damping transfer system (ADTS), which transfers the rotation of upper turbine tower to the jacket platform, making it convenient to install viscous dampers to dissipate external energy. Moreover, ADTS significantly amplifies the rotation deformation to fully drive the viscous damper. Different from traditional tuned mass damper (TMD) which may lose its effectiveness for higher modes, ADTS provides additional damping to both fundamental and higher modes of JOWT, resulting in better performance in resisting multiple hazards. For example, the displacements of turbine tower in JOWTs subjected to winds, waves, and earthquakes are mitigated by about 23.05%, 63.41%, and 48.96%, respectively; in the meantime, the turbine accelerations subjected to those hazards are also reduced by about 34.28%, 62.72%, and 35.27%. Moreover, ADTS also provides considerably response reduction effect to the supporting jacket of JOWTs.
Keyword ：
Amplifying damping transfer system Amplifying damping transfer system Multiple hazards Multiple hazards Higher mode effect Higher mode effect Tuned mass damper Tuned mass damper Jacket offshore wind turbine Jacket offshore wind turbine
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| GB/T 7714 | Wang, Meng , Zhang, Wen -Qian , Wang, Pi-Guang et al. Multiple hazards vibration control of jacket offshore wind turbines equipped with amplifying damping transfer systems: Winds, waves, and earthquakes [J]. | OCEAN ENGINEERING , 2023 , 285 . |
| MLA | Wang, Meng et al. "Multiple hazards vibration control of jacket offshore wind turbines equipped with amplifying damping transfer systems: Winds, waves, and earthquakes" . | OCEAN ENGINEERING 285 (2023) . |
| APA | Wang, Meng , Zhang, Wen -Qian , Wang, Pi-Guang , Du, Xiu-Li . Multiple hazards vibration control of jacket offshore wind turbines equipped with amplifying damping transfer systems: Winds, waves, and earthquakes . | OCEAN ENGINEERING , 2023 , 285 . |
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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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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 ：
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 ：
An analytical solution has been developed to investigate the dynamic responses of floating pile with different soil viscoelastic half-space types. The dynamic response of a pile is gov-erned by 1D vibration theory, in which the pile is assumed to be viscoelastic material with a circular cross-section and can be divided into two pile segments in a soil-air system. Meanwhile, the dynamic solution for soil is achieved by the application of the potential function decomposition and the variable separation method. Moreover, an analytical solu-tion considering the viscoelastic half-space of the soil free-field under horizontal SV wave is established. Furthermore, the dynamic pile-soil interaction is established and solved ef-ficiently through a precise theoretical derivation based on the displacement compatibility and traction equilibrium at the interface between the pile and soil.The present solution is compared with the substructure method and analytical solution with a rigid foundation to verify the rationality of the present analytical solution. Then, the similarities and differences among several foundation types are discussed based on the present analytical solution. The results have a certain guiding significance for engineering structures.(c) 2022 Elsevier Inc. All rights reserved.
Keyword ：
Viscoelastic half -space Viscoelastic half -space Horizontal vibrating pile Horizontal vibrating pile Pile -soil interaction Pile -soil interaction Dynamic response Dynamic response Analytical solution Analytical solution
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| GB/T 7714 | Huang, Yiming , Zhao, Mi , Wang, Piguang et al. Analytical solution of dynamic response of horizontal vibrating pile with different soil viscoelastic half-space types [J]. | APPLIED MATHEMATICAL MODELLING , 2023 , 114 : 823-845 . |
| MLA | Huang, Yiming et al. "Analytical solution of dynamic response of horizontal vibrating pile with different soil viscoelastic half-space types" . | APPLIED MATHEMATICAL MODELLING 114 (2023) : 823-845 . |
| APA | Huang, Yiming , Zhao, Mi , Wang, Piguang , Xu, Haibin , Du, Xiuli . Analytical solution of dynamic response of horizontal vibrating pile with different soil viscoelastic half-space types . | APPLIED MATHEMATICAL MODELLING , 2023 , 114 , 823-845 . |
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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 ：
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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