Calculation of slamming wave loads on monopiles using fully nonlinear kinematics and a pressure impulse model

The design methods for highly nonlinear wave loads on monopile structures has over the past years been extended with based pre-computed fully kinematics. Yet, slamming events of strong sea states cannot currently be predicted these methods. We here present a simple recipe application recent pressure impulse load model in combination kinematics and validate results against lab measurements uni- multi-directional storm states. experimental are extracted from equivalent to 954 full scale hours. Six extraction force developed analysed detail, final selection two further analysis. analysis shows that frequency is larger uni-directional relative directional spreading, slightly smaller impulses. calculated frequencies used numerical model. It shown straightforward robust involves an intuitive inputs incident A generally good agreement between measurement distributions observed. difference 3D 2D impulses, though, found This traced particle velocities crests. next by assuming predefined generic time variation through calibration peak force, ensemble-averaged measured series obtained, given uncertainty extraction. also observed commonly non-dimensional 2? unrealistically large irregular waves because effects small curling factors.