Open AccessConceptual jacket design by structural optimization
Author(s) -
Sandal Kasper,
Verbart Alexander,
Stolpe Mathias
Publication year - 2018
Publication title -
wind energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.743
H-Index - 92
eISSN - 1099-1824
pISSN - 1095-4244
DOI - 10.1002/we.2264
Subject(s) - conceptual design , sizing , turbine , structural engineering , multidisciplinary design optimization , limit (mathematics) , beam (structure) , optimization problem , offshore wind power , added mass , engineering , computer science , mathematical optimization , mechanical engineering , mathematics , physics , art , mathematical analysis , social science , vibration , quantum mechanics , multidisciplinary approach , sociology , visual arts
We present an approach for sizing optimization of jacket structures and apply it to investigate the conceptual design of jackets for offshore wind turbines. Conceptual design is an input to early structural and financial models, and we assume simplified analysis and load models. A four‐legged jacket for the DTU 10‐MW wind turbine in 50‐m water depth is modelled by Timoshenko beam finite elements, and the structural dimensions of the beam cross sections are considered as continuous design variables. A structural optimization problem is formulated to minimize the jacket mass, with constraints on fatigue and ultimate limit states. The optimal design problem is then used to investigate how the optimized mass depends on the number of bays and the jacket leg distance. The conceptual design investigation led to a new conceptual design with 14% lower mass compared with the original conceptual design. We conclude that structural optimization can provide useful insights in the conceptual design phase and lead to a better starting point for the further design and planning processes.