Analysis of Nonstationary Typhoon Winds Based on Optimal Time-Varying Mean Wind Speed
Publication: Journal of Structural Engineering
Volume 148, Issue 12
Abstract
The time-varying mean (TVM) component has a major influence on the characterization of nonstationary wind events and associated parameters of the fluctuating components. However, it is challenging to determine the optimal TVM of the nonstationary wind speed accurately due to variability in the low-frequency signal contents. To address this challenge, this study develops an effective wavelet-based method together with necessary conditions to calculate the optimal TVM from nonstationary wind speed data. For comparison, the time-dependent memory method is also used and enhanced to obtain the optimal TVM. Wind field turbulence characteristics of Typhoon Mangkhut are then analyzed and presented based on the conventional stationary model and nonstationary model with the proposed optimal TVM. In addition, this study also proposes an empirical description of the wind spectrum, which provides a better fit to the typhoon-related nonstationary winds than those offered by classical wind spectral description.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The work described in this paper was partially supported by the Ministry of Science and Technology of China (Project No. 2018YFE0109500), the National Natural Science Foundation of China (Project Nos. 51838012, 52178512, and 51978614), and the Natural Science Foundation of Zhejiang Province (Project No. LZ22E080006).
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Journal of Structural Engineering
Volume 148 • Issue 12 • December 2022
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© 2022 American Society of Civil Engineers.
History
Received: Feb 21, 2022
Accepted: Jun 17, 2022
Published online: Oct 7, 2022
Published in print: Dec 1, 2022
Discussion open until: Mar 7, 2023
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Cited by
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