Session: 09-01-03 Installation, Marine Operations and Maintenance - 3

Paper Number: 80701

80701 - Dynamic Analysis of Blade Mating Process Using Jack-Up Crane Vessel: A Code-to-Code Comparison 

Offshore wind turbine installation is a challenging task which poses a complex physical problem. Jack-up crane vessels are commonly used for blade installation in shallow waters. The relative motion between the blade and the hub should be minimal during the blade mating process to avoid structural damage. The motion of the blade root is mainly caused due to wind loads on the lifting arrangement and wave loads on the jack-up legs. Thus, it becomes crucial to reliably estimate the motion of the blade installation system. Currently, there are many software and tools which are used to perform such an analysis, and the comparison of their results is required for a convincing prediction of dynamic responses. This study aims to numerically model and analyse the blade mating process using a jack-up crane vessel in Orcaflex, and perform a code-to-code comparison with SIMA. The comparison were performed at different levels such as – (1) modal analyses of the jack-up vessel and the blade lifting arrangement, (2) sensitivity study with foundation models, and (3) time-domain analysis for fully coupled model of installation system. The results of this study will aid in reliable prediction of responses in the offshore blade mating process resulting in efficient estimation of safe weather window for the task.

Presenting Author: Saravanan Bhaskaran Norwegian University of Science and Technology

Authors:

Saravanan Bhaskaran Norwegian University of Science and Technology
Amrit Shankar Verma The University of Maine
Shuai Yuan Norwegian University of Science and Technology
Karl Henning Halse Norwegian University of Science and Technology