Dynamic response simulation of an offshore wind turbine suspended by a floating crane

Abstract

Recently, a number of wind turbines are being installed due to the increase of the interest in green energy. Such wind turbines are installed on land or offshore, and most of them are being installed on land because of easy installation. However, because it is possible to get better wind quality in offshore, the request for an offshore wind turbine is increasing and some heavy industries including shipyards are producing different sizes of offshore wind turbines. A floating crane is used for constructing the offshore wind turbine because its weight amounts to several hundred tons. Thus, it is very important to secure the safety during the construction. In this study, a dynamic response simulation of the offshore wind turbine suspended by the floating crane is performed. For this, we supposed that the motion of the floating crane and the wind turbine has 14 degrees of freedom, and there is the interaction by constraints among them. In addition, hydrostatic and hydrodynamic forces which are independent of each other are considered as external forces acting on the floating crane. The simulation result can be used for the verification of the safety of the construction method which the offshore wind turbine is constructed by the floating crane and the application guidance of this method.

Keywords:

• offshore wind turbine
• floating crane
• simulation
• dynamic response
• multibody system dynamics

Additional information

Funding

This work was supported by Dong-eui University, Republic of Korea [grant number 2014AA444], Industrial Strategic Technology Development Program (10035331, Simulation-based Manufacturing Technology for Ships and Offshore Plants) funded by the Ministry of Trade, Industry & Energy, Republic of Korea, and Brain Korea 21 Plus Program (Education and Research Center for Creative Offshore Plant Engineers of Seoul National University) funded by the Ministry of Education, Republic of Korea, and Research Institute of Marine System Engineering of Seoul National University, Republic of Korea.