Offshore wind monopile foundations are subjected to strong wave current nonlinear effects and horizontal vi-bration loads caused by strong winds, waves, and rotating blades. In order to understand the rule of sediment movement around monopile under different vibration frequencies and amplitude, a cyclic loading test was carried out in the sand tank. The motion and migration rule of sediment particles around monopile under vi-bration action was observed by color tracer sand. The development process of the subsidence pit was qualita-tively described by comparing the typical moment photos of sedi...
