TY - JOUR
T1 - Time-varying wind speed identification from structural responses by modified iterative method
AU - Bu, JianQing
AU - Law, SiuSeong
AU - Zhu, XinQun
PY - 2012
Y1 - 2012
N2 - The aim of this study is to try to identify the time-varying wind speed in longitudinal direction at the referenced level from structural responses. The random fluctuating wind speed process was simulated by spectral representation method and FFT method, together with the power law used to calculate wind load. Based on the vibration equation of system in state space and regularization technique, the wind speed at referenced level can be identified from structural responses. The modified iterative method is proposed to reduce the identified errors induced by the difference of the fluctuating wind speed at different level. A 50 m tall guyed mast is selected as an example, and used to check the validation and effectiveness of the proposed method. Simulated numerical results indicated that the proposed method can be used to identify wind speed values from structural displacement responses or strain responses accurately and effectively. Displacement or strain responses obtained in two orthogonal directions at a reference level only are required for an accurate identification and modified iterative method can improve the identified results obviously.
AB - The aim of this study is to try to identify the time-varying wind speed in longitudinal direction at the referenced level from structural responses. The random fluctuating wind speed process was simulated by spectral representation method and FFT method, together with the power law used to calculate wind load. Based on the vibration equation of system in state space and regularization technique, the wind speed at referenced level can be identified from structural responses. The modified iterative method is proposed to reduce the identified errors induced by the difference of the fluctuating wind speed at different level. A 50 m tall guyed mast is selected as an example, and used to check the validation and effectiveness of the proposed method. Simulated numerical results indicated that the proposed method can be used to identify wind speed values from structural displacement responses or strain responses accurately and effectively. Displacement or strain responses obtained in two orthogonal directions at a reference level only are required for an accurate identification and modified iterative method can improve the identified results obviously.
UR - http://handle.westernsydney.edu.au:8081/1959.7/uws:41963
UR - http://www.techrev.org.uk/jcec/1.1.html
M3 - Article
SN - 2051-7769
VL - 1
SP - 12
EP - 25
JO - Journal of Civil Engineering and Construction
JF - Journal of Civil Engineering and Construction
IS - 1
ER -