Seismic response analysis of monopile wind turbine under obliquely incident seismic waves

Abstract

When the seismic source is shallow or the wind turbine structure is moderately distant from the epicenter, it is necessary to consider the oblique incidence of planar body waves. To investigate the dynamic response law of wind turbine structures under oblique seismic wave incidence, this study establishes an integrated approach for analyzing the dynamic response of wind turbine structures considering oblique seismic wave incidence, incorporating one‐dimensional time‐domain site response analysis and viscoelastic artificial boundaries. By using the above seismic input method, the dynamic response law of a 5 MW monopile wind turbine under the obliquely incident P and SV waves are analyzed in detail when different characteristics, incident angles, propagation angles and vibration directions of waves are considered. Numerical studies show that the above factors have an important influence on the seismic response of the wind turbine structure.