利用有限元软件进行缩径单桩承载特性研究,数值结果表明,相比于常规单桩,缩径单桩拥有更大的竖向承载力;从等效塑性应变云图可知,缩径单桩的竖向承载模式由常规单桩的桩端承载变为桩端和缩径段共同承载模式;缩径段高度和直径变化对承载力有显著影响;通过对竖向承载力各段占比大小计算,可知缩径段的外侧承担主要竖向荷载,约65%。
Abstract
The bearing characteristics of reduced diameter monopile of offshore wind power was researched in this paper using the finite element software. The numerical results show that the reduced diameter monopile has greater vertical bearing capacity than that of the conventional monopile. It can be seen from the equivalent plastic strain map that the vertical load mode of the reduced diameter monopile changes to the joint load mode of the end and the reducing section, compared to the end load mode of the conventional monopile. The height and diameter of the reducing section have a significant influence on the bearing capacity. Through the calculation of the proportion of each section of vertical bearing capacity, the outside of the reduced section bears the main vertical load, about 65%.
关键词
海上风电场 /
海上风力发电机 /
海上风电结构 /
缩径单桩 /
单桩基础 /
承载特性
Key words
offshore wind farms /
offshore wind turbines /
offshore wind power structures /
reduced diameter monopile /
monopile /
bearing characteristic
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 朱蓉, 徐红, 龚强, 等. 中国风能开发利用的风环境区划[J]. 太阳能学报, 2023, 44(3): 55-66.
ZHU R, XU H, GONG Q, et al.Wind environmental regionalization for development and utilization of wind energy in China[J]. Acta energiae solaris sinica, 2023, 44(3): 55-66.
[2] 林逸凡, 杨梓豪, 刘玉飞, 等. 中国沿海风电施工窗口期及功效分析[J]. 太阳能学报, 2023, 44(1): 273-280.
LIN Y F, YANG Z H, LIU Y F, et al.Analysis of weather window and construction efficiency for wind power development in offshore China[J]. Acta energiae solaris sinica, 2023, 44(1): 273-280.
[3] COLIN W.Offshore wind in Europe 2021: key trends and statistics[R]. WindEurope, 2022.
[4] 郭文文, 金晨, 汤徐伟, 等. 圆盘式混合单桩基础的承载特性研究[J]. 水力发电, 2020, 46(5): 118-122.
GUO W W, JIN C, TANG X W, et al.Study on the load-bearing of pile-disc hybrid foundation (PDHF) for offshore wind turbine[J]. Water power, 2020, 46(5): 118-122.
[5] YANG X, ZENG X W, WANG X F, et al.Performance and bearing behavior of monopile-friction wheel foundations under lateral-moment loading for offshore wind turbines[J]. Ocean engineering, 2019, 184: 159-172.
[6] 郭文婷. 海上风电单桩-摩擦轮基础承载特性研究[D]. 青岛: 山东科技大学, 2020.
GUO W T.Study on bearing characteristics of offshore wind power single pile-friction wheel foundation[D]. Qingdao: Shandong University of Science and Technology, 2020.
[7] 朱东剑. 筒型基础与单桩相结合的新型复合风电基础研究[D]. 天津: 天津大学, 2012.
ZHU D J.Study on a new type of composite wind power foundation combining bucket foundation with single pile[D]. Tianjin: Tianjin University, 2012.
[8] 文松霖. 砂土中加翼桩的水平承载能力试验研究[J]. 岩土工程学报, 1990, 12(4): 61-67.
WEN S L.Experimental study on horizontal bearing capacity of winged pile in sandy soil[J]. Chinese journal of geotechnical engineering, 1990, 12(4): 61-67.
[9] 张磊, 罗丹阳, 陈成, 等. 软弱土中单桩-承台基础竖向与水平承载特性分析[J]. 三峡大学学报(自然科学版), 2022, 44(1): 74-80.
ZHANG L, LUO D Y, CHEN C, et al.Analysis of vertical and horizontal bearing characteristics of single pile-cap foundation in soft soil[J]. Journal of China Three Gorges University (natural sciences), 2022, 44(1): 74-80.
[10] 赵爽, 吴君涛, 张日红, 等. 砂土中斜桩单桩水平承载与变形特性数值分析[J]. 中南大学学报(自然科学版), 2022, 53(2): 579-588.
ZHAO S, WU J T, ZHANG R H, et al.Numerical analysis of horizontal bearing capacity and deflection behaviors of single batter pile in sand[J]. Journal of Central South University (science and technology), 2022, 53(2): 579-588.
[11] 郭健, 王皓, 骆光杰, 等. 海上风机变径单桩基础水平承载特性数值分析[J]. 科学技术与工程, 2022, 22(9): 3658-3664.
GUO J, WANG H, LUO G J, et al.Numerical analysis of horizontal bearing capacity of variable diameter pile foundation for offshore wind turbine[J]. Science technology and engineering, 2022, 22(9): 3658-3664.
基金
海上风电场基础冲刷防护治理理论、措施及工程应用研究（HNKJ23-H18）
PDF(1531 KB)
