海上风电裙式吸力基础水平变幅非对称循环承载特性

李大勇; 黄凌昰; 吴宇旗; 张景睿

doi:10.19912/j.0254-0096.tynxb.2022-0918

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (10) : 391-399. DOI: 10.19912/j.0254-0096.tynxb.2022-0918

海上风电裙式吸力基础水平变幅非对称循环承载特性

李大勇^1,2, 黄凌昰¹, 吴宇旗², 张景睿¹

作者信息 +

BEARING BEHAVIORS OF MODIFIED SUCTION CAISSON UNDER HORIZONTAL VARIABLE AMPLITUDE AND ASYMMETRICAL CYCLIC LOADS FOR OFFSHORE WIND TURBINES

Li Dayong^1,2, Huang Lingxia¹, Wu Yuqi², Zhang Jingrui¹

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文章历史 +

摘要

针对海上风电在深海区域所受风、波浪等循环荷载作用特征,进行裙式吸力基础水平非对称循环加载模型试验,探究非对称循环荷载幅值大小、循环次序和对称性等因素对其累积位移及转角变化的影响规律。结果表明：逐阶增大的变幅循环加载时,裙式吸力基础在幅值比低、循环次数少（Δζ_b=0.1，N=500）的情况下产生的累积位移和转角大于幅值比高、循环次数多（Δζ_b=0.2，N=1000）的情况;非对称循环加载（ζ_c=-0.3）时,裙式吸力基础的累积位移与转角较对称加载时呈增长趋势;完全双向加载（ζ_c=-1.0）时,吸力基础的累积位移与转角在变方向后相比单向循环加载的情况下降1/3。相同变幅和非对称加载情况下,裙式吸力基础的累积位移和转角仅为传统吸力基础的50%。

Abstract

A series of horizontal cyclic loading （resulted from wind and waves in deep sea） model tests on modified suction caissons （MSCs） are conducted under variable amplitude and asymmetrical cyclic loads. The factors concerned with cumulative displacement and rotation, such as amplitude, number of cycles, cyclic order, asymmetry （two-way） are discussed. The results show that the cumulative displacement and rotation of MSCs with a small amplitude increment and number of cycles （Δζ_b=0.1, N=500） are greater than that with a larger amplitude increment and number of cycles （Δζ_b=0.2, N=1000） under progressively increased cyclic loading; under asymmetric loading （ζ_c=-0.3）, the cumulative displacement and rotation of MSCs tend to increase compared with that under symmetric loading; under fully two-way loading （ζ_c=-1.0）, the cumulative displacement and rotation of MSCs decrease by 1/3 compared with that under unidirectional cyclic loading after changing the direction. The cumulative displacement and rotation of MSCs are 50% of regular suction caissons （RSCs） under variable amplitude and asymmetrical cyclic loading.

导出引用

李大勇, 黄凌昰, 吴宇旗, 张景睿. 海上风电裙式吸力基础水平变幅非对称循环承载特性[J]. 太阳能学报. 2023, 44(10): 391-399 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0918

Li Dayong, Huang Lingxia, Wu Yuqi, Zhang Jingrui. BEARING BEHAVIORS OF MODIFIED SUCTION CAISSON UNDER HORIZONTAL VARIABLE AMPLITUDE AND ASYMMETRICAL CYCLIC LOADS FOR OFFSHORE WIND TURBINES[J]. Acta Energiae Solaris Sinica. 2023, 44(10): 391-399 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0918

中图分类号： P754

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