Influence of soil–structure modelling techniques on offshore wind turbine monopile structural response

The importance of appropriate offshore wind turbine (OWT) monopile structural modelling technique cannot be overstated in the successful design and installation a new generation larger heavier structures to deliver increasing capacity demand. lack clear guidance acceptable techniques across industry results range conservative but expensive techniques. Most OWT efforts lie substructure (foundation) interaction with supporting soil which is highly nonlinear along length embedment depth structure. Typically, can completed using, amongst others, one following techniques: 3D finite element mass foundation, API p-y curve springs, JeanJean newly developed PISA approach. study presented this paper considers application soil, springs technique. By comparing response, an improved natural frequency harmonic response. Furthermore, reduced displacement was observed model will ultimately result corresponding improvement structure's useful operational life. other requires extensive calibration ensure correct response behaviour are achieved. This becomes key factor as boundaries size structure pushed even further for concept turbines, required higher 12 15 MW aim achieving 20 MW, whilst efficient cost-effective engineering process.