RESEARCH ON THE OFFSHORE WIND TURBINE MONOPILE FOUNDATION UNDER LONG-TERM CYCLIC LOADING
MA Hongwang, YANG Jun, Chen Longzhu
1 Department of Civil Engineering, Shanghai Jiaotong University, Shanghai, 200240, China
2 Department of Civil Engineering, Hong Kong University, Hong Kong, China
The offshore wind turbines are often supported on monopiles with large diameter, and are exposed to several types of external loadings, especially the wind and wave actions. These type of cyclic loadings can lead to an accumulated rotation of the wind turbine tower and changes in the foundation stiffness, which is an important design parameter for offshore wind turbines. The standard design procedure for considering the effects of cyclic loading on offshore monopile is the p-y curve method, which is adopted in the American Petroleum Institute standards. The p-y curve method has been derived from field tests with fewer than 200 cycles and piles diameters ranging up to 0.6 meters, and may not be applicable to monopoles with large diameters and subjected to much higher numbers of cyclic loading. The purpose of this study is to establish an overall numerical model to study the displacement of an offshore wind turbine on a monopile in a sandy seabed under long-term cyclic lateral loading. A simplified model to account for the influence of long-term cyclic loading on the soil surrounding the pile was adopted based on the model test results in the literature. A parametric study was also conducted to examine several factors on the displacement of the wind turbine.
收稿日期: 2016-05-24
出版日期: 2018-01-15
引用本文:
马宏旺,杨峻2,1,陈龙珠1. 长期反复荷载作用对海上风电单桩基础的影响分析[J]. 振动与冲击, 2018, 37(2): 121-126.
MA Hongwang, YANG Jun, Chen Longzhu. RESEARCH ON THE OFFSHORE WIND TURBINE MONOPILE FOUNDATION UNDER LONG-TERM CYCLIC LOADING. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(2): 121-126.
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