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 ...

Due to the efficiency in implementation, the Walsh (Hadamard) transform plays an important role in signal analysis and communication. Recently, Lee generalized the Walsh transform into the Jacket transform. Since the entries of the Jacket transform can be ±2, it is more flexible than the Walsh transform. Both the Walsh transform and the Jacket transform are defined for the case where the length...

The irregular wave disturbance attenuation problem for jacket-type offshore platforms involving the nonlinear characteristics is studied. The main contribution is that a digital-control-based approximation of optimal wave disturbances attenuation controller (AOWDAC) is proposed based on iteration control theory, which consists of a feedback item of offshore state, a feedforward item of wave for...

Abstract Accuracy in analysing the integrity of a structure is critical for determining structure’s fitness service and reliability status. Today, variety techniques approaches are applied, including use data science applications. Data synthesis computer science, mathematics, statistics. Meanwhile, susceptible to mix statistical technical design uncertainties that may remain flexible as long ca...

Offshore jacket platforms (OJPs) may be exposed to harsh environmental conditions during their operation in different return periods. It is necessary evaluate the dynamic performance of OJPs subjected extreme wave loadings secure a safe operation. In earlier studies, various approaches were introduced analyze response an OJP sea states. However, serious shortcoming proposed methods computationa...