Framework for dynamic response analysis of monopile supported offshore wind turbine excited by combined wind-wave-earthquake loading

Xi, Renqiang; Xu, Chengshun; Du, Xiuli; Naggar, M. Hesham El; Liu, Lin; Zhai, Endi

doi:10.1016/j.oceaneng.2022.110743

Cited by 31 publications

(7 citation statements)

References 51 publications

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“…ADINA software 9 excels in addressing both linear and nonlinear challenges. Utilizing the incremental method, a numerical strategy for managing nonlinear physical complexities, ADINA effectively navigates these issues [21][22][23]. It adjusts the incremental step, typically by modifying load or time increments, to closely mimic the actual solution during the simulation.…”

Section: Software and Methodsmentioning

confidence: 99%

Modeling Rainfall Impact on Slope Stability: Computational Insights into Displacement and Stress Dynamics

Zong,

Zhang,

Liu

et al. 2024

Water

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The susceptibility of loess slopes to collapses, landslides, and sinkholes is a global concern. Rainfall is a key factor exacerbating these issues and affecting slope stability. In regions experiencing significant infrastructure and urban growth, understanding and mitigating rainfall effects on loess landslides is crucial. ADINA numerical software 9 was utilized to explore rain-induced erosion’s influence on landslide dynamics. The simulations were based on local rainfall trends. The rainfall intensities examined were as follows: 200 mm/day, 300 mm/day, and 400 mm/day. The results indicate a pronounced impact of rainfall intensity on both the movement and stress levels within the slope. Higher rainfall intensities lead to increased movement and a wider stress impact area at the base of the slope. It was observed that surface movement is minimal at the slope crest but increases towards the bottom, with the greatest movement seen at the slope’s base.

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Section: Software and Methodsmentioning

confidence: 99%

Modeling Rainfall Impact on Slope Stability: Computational Insights into Displacement and Stress Dynamics

Zong,

Zhang,

Liu

et al. 2024

Water

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“…where c s is the foundation damping coefficient; ρ s and G s are the density and shear modulus of the soil, respectively; ω 1 is the first-order natural angular frequency of the support structure; k s is the initial stiffness of the p-y curves; and β s is the hysteresis damping ratio with a value of 5%. The shear modulus of the soil for the site illustrated in Figure 4 was taken from the literature [47]. For the sake of brevity, it is not listed here again.…”

Section: Methodsmentioning

confidence: 99%

Influence of Blade Flexibility on the Dynamic Behaviors of Monopile-Supported Offshore Wind Turbines

Lai,

Li,

et al. 2023

JMSE

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At present, monopole-supported offshore wind turbines (MOWTs) are widely used in offshore wind farms. The influence of blade flexibility on the dynamic behaviors of MOWTs excited by waves and earthquakes was investigated in this study. Numerical analysis models were established for 5 MW and 10 MW MOWTs, incorporating flexible and rigid blade configurations. The modes and natural frequencies of the full system were compared between these two numerical models, and their dynamic responses were evaluated under wave-only and earthquake-only excitations. It was revealed that the influence of blade flexibility on the first- and second-order modes of the system can be neglected. The dynamic response of these MOWTs under wave excitation can be predicted by the rigid blade model, where the maximum relative difference is less than 5%. However, higher-order modes of the system are significantly affected by the blade flexibility. Under high-frequency excitations, these higher-order modes of the system are remarkably stimulated. Additionally, a large relative difference, exceeding 50%, is detected when the rigid blade model is used to predict the seismic response of the two MOWTs. Consequently, the blade flexibility should be adequately modeled when predicting the dynamic response of OWTs.

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“…3D analysis is done because the building system behaves like a straight cantilever when under a plane bend. The structure is analysed for both wind power and earthquakes [11]. The building is studied by the outriggers provided during the height of the building at different levels to determine the migration and erosion of the floor.…”

Section: Building Analysismentioning

confidence: 99%

Performance Assessment of Outrigger System for High Rise Slender Structures

Rathore,

Ansari,

Baghel

et al. 2023

E3S Web Conf.

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High-rise slender structures have become increasingly prevalent in modern urban landscapes due to the demand for efficient land use and sustainable development. However, these tall and slender buildings are susceptible to various structural challenges, including wind-induced vibrations and lateral deformations. To mitigate these issues and ensure the safety and comfort of occupants, outrigger systems have emerged as a popular structural solution. Through a thorough examination of their structural performance, the outrigger systems used in high-rise, slender structures are examined in this study to determine how they behave and how successful they are. In this way, the design base shear for the entire structure is calculated and distributed over its height. Response spectrum analysis employs eigen value analysis to identify natural frequencies and mode shapes. While time history analysis is a method for figuring out the precise reaction of a structure as a function of time, it is used to compute the peak response. The equation of motion is typically numerically integrated step by step to calculate the response history. This paper explores the impact of earthquakes on outrigger systems in high-rise slender structures. Outrigger systems, which typically consist of horizontal beams connecting the core and the perimeter of the building, play a crucial role in mitigating the effects of seismic activity. These systems provide stiffness and strength to the structure, limiting lateral sway and reducing damage during an earthquake. This paper innovative technologies and construction techniques that enhance the earthquake resilience of outrigger systems. This includes the use of advanced materials, base isolators, and dampers to improve the performance of high-rise slender structures during seismic events.

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Framework for dynamic response analysis of monopile supported offshore wind turbine excited by combined wind-wave-earthquake loading

Cited by 31 publications

References 51 publications

Modeling Rainfall Impact on Slope Stability: Computational Insights into Displacement and Stress Dynamics

Modeling Rainfall Impact on Slope Stability: Computational Insights into Displacement and Stress Dynamics

Influence of Blade Flexibility on the Dynamic Behaviors of Monopile-Supported Offshore Wind Turbines

Performance Assessment of Outrigger System for High Rise Slender Structures

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