Seismic performance analysis of a wind turbine with a monopile foundation affected by sea ice based on a simple numerical method

Abstract

To investigate the seismic performance of a wind turbine that is influenced by both the ice load and the seismic load, the research proposes a numerical approach for simulating the seismic behavior of a wind turbine on a monopile foundation. First, the fluid-solid coupled equation for the water-ice-wind turbine is simplified by assigning reasonable boundary conditions and solving the motion equation, and the seismic motion equation of the wind turbine is developed. Then, on this basis, we propose a simplified 3D numerical model that can simulate the interactions among the wind turbine, water and sea ice. By conducting shaking table tests, the results demonstrate that the established numerical model is effective. Finally, we investigate the effect of the boundary range and ice thickness on the seismic performance of a turbine under near-field and far-field seismic actions. Research results illustrate that ice changes the distribution form of the hydrodynamic pressure. Moreover, the thickness of the ice greatly influences the seismic behavior, while the influence of the ice boundary range is only within a certain range. Additionally, the ice load decreases the energy-dissipating capacity of the wind turbine, so the earthquake resilience of the wind turbine is significantly decreased.

Co‐planning of generation and transmission expansion planning for network resiliency improvement against extreme weather conditions and uncertainty of resiliency sources

“…This is proposed as future work. Due to the operating costs and low pollution levels [51][52][53], some generation units are based on renewable sources such as wind farms is used in power system. The generation power of these resources is intermittent with uncertainty [54][55][56].…”

Probabilistic Slope Stability Evaluation Using Hybrid Metaheuristic Approach

“…It should be noted that the correlation matrix must be positive definite. It must be emphasized that the correlation matrix has to be positive definite [33].…”

Seismic Performance of Super High-Rise Building Structure with Dual Lines of Defense Based on Response Surface Optimization Algorithm

“…e seismic structure system shall have the maximum possible internal and external redundancy and consciously establish a series of distributed yield zones so that the structure can absorb and dissipate a large amount of seismic energy, and it is easy to repair once damaged. If the building adopts multiple lines of defense, after the antilateral force members of the first line of defense are damaged under the strong earthquake attack, the antilateral force members of the second line of defense will be replaced immediately to withstand the impact of the subsequent ground motion, which can ensure the minimum safety of the building and avoid collapse [18,19].…”