YANG Feng 1, 2, GAO Ji-zhang 1, 2, ZHANG Jin-jie 1, 2, ZENG Di 1

1. Earthquake Engineering Research Center, IWHR, Beijing 100048, China;
2. Beijing IWHR Technology Co., Ltd, IWHR, Beijing 100038, China

Abstract: The pile foundation structure is used in most offshore wind farm of China. The structure of pile foundation and tower is a typical slender-tall structure. In the complex ocean environment loads, the structure system has obvious dynamic, stochastic and non-linear properties. This paper analyzed the correlation between structure vibration and environmental loads, such as wind, wave and other environmental loads. The paper concludes that the vibration acceleration at the top of the tower increases with the mean square deviation of wind according to long-term vibration monitoring data of Xiangshui offshore wind farm in Jiangsu province. The paper also developed a model for dynamic simulation and analysis, and the model calculation results reflect the response of offshore wind turbine power under different conditions. The above research results provide the reference for offshore wind turbine design.

Key words: offshore wind turbine, pile foundation, vibration monitoring, dynamic response analysis

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 11 No. 2, 2013)