Experimental study on dynamic response of seabed around offshore monopile under wave action

Abstract

The hydrodynamic loads exerted on offshore wind structures are intricate, and primarily influenced by marine dynamics. The interaction between waves and seabed soil can lead to liquefaction, posing a threat to the secure functioning of offshore installations. This study focuses on the silty seabed, investigating the soil surrounding the monopile through pore pressure response tests conducted in a specially designed wave tank. The research delves into the pore pressure response patterns at various depths and positions of the piles. The findings reveal that the amplitude of pore pressure elevation preceding the introduction of a pile is greater than the post-pile values. Moreover, there is a notable escalation in pore pressure amplitude with increasing depth. Consequently, in practical applications, safeguarding the deeper region in front of the monopile assumes paramount importance. These research outcomes offer valuable insights for enhancing the safety protocols governing offshore wind turbine operations. The emphasis on shielding the deeper sections preceding the monopile, as suggested by this study, holds practical significance in optimizing the operational safety of offshore wind power installations.