A damage detection method is presented which combines the random decrement technique (RDT) with long and short-term memory (LSTM) networks. The uses measured vibration response of offshore structures subjected to excitation able locate assess accuracy, even in noisy conditions. applicability proposed RDT-LSTM verified through a numerical example laboratory tests. consists jacket platform wave e...

As an important contribution to the fulfilment of renewable energy targets, offshore wind sector in Europe has grown significantly over past decade (WindEurope 2021). Jacket structures are becoming more widely used as substructures for turbines accommodate expansion towards greater water depth and provide a stable basis megastructures with hub heights than 200 m. However, there have been few st...

Decommissioning offshore platforms present unique safety and health challenges to the oil gas industry. In Malaysian waters, there are over 300 fixed jacket platforms, most of them exceeded design service life 25 30 years. One key that determine method removal aged is subsea cutting techniques. As underwater a challenging expensive task, it very much essential develop cost-effective techniques ...

Tetrapod piled jacket (TPJ) foundations that support offshore wind turbines (OWTs) tend to be subjected significant torque is caused by eccentric loading from wind, waves, or accidental vessel impact. This paper presented a comprehensive three-dimensional (3D) numerical analysis investigate TPJs performance under torsional loading, which considered the distribution of local and rotation over pi...

This study investigates the seismic response of a horizontal axis wind turbine on two bottom-fixed support structures for transitional water depths (30-60 m), a tripod and a jacket, both resting on pile foundations. Fully coupled, nonlinear time-domain simulations on full system models are carried out under combined wind-wave-earthquake loadings, for different load cases, considering fixed and ...