%0 Journal Article %T Identifying the stiffness reduction in the supporting tower of wind turbines: a numerical approach %A Lin, Yung-Chiang %A Chiang, Chih-Hung %A Yu, Chih-Peng %A Hsu, Keng-Tsang %J Proceedings of SPIE %V 10971 %P 1097122-1097122-10 %@ 0277-786X %D 2019-04-01 %I SPIE %~ DeepDyve