ABSTRACT
The development of an accurate and reliable jack-up model is essential for understanding the hydrodynamic performance of structure, as well as ensuring the structural safety. As part of development of a digital twin, a simplified jack-up numerical model was created based on basin model test. Critical components are the fixity of leg-to-hull connection and spudcan fixity where spring elements were employed. Model updating technique was applied to the measured data to identify the parameters of these fixities. These data, including the hull displacement, leg-to-hull and spudcan moments, were incorporated into the cost function where the difference between model prediction and measured structural responses were minimized. Using the updated model, the predicted responses were consistent with the measured data indicating that the boundary fixities were reasonably estimated. The updated jack-up model can serve as a reliable platform for monitoring and predicting the overall performance of the actual structure.
