海上风电三筒导管架基础循环荷载响应特性试验研究

朱嵘华; 赵树龙; 张融圣; 刘寒秋; 赖宗元; 潘宇飞

doi:doi:10.19912/j.0254-0096.tynxb.2024-1228

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海上风电三筒导管架基础循环荷载响应特性试验研究

更新时间：2025-12-10

- 海上风电三筒导管架基础循环荷载响应特性试验研究
- Issue 11, Pages: 667-675(2025)
- 作者机构：
- 作者简介：
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- DOI：doi:10.19912/j.0254-0096.tynxb.2024-1228
  CLC： K81
- Published Online：04 December 2025，
  
  Published：04 December 2025
- 稿件说明：
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朱嵘华, 赵树龙, 张融圣, et al. 海上风电三筒导管架基础循环荷载响应特性试验研究[J]. 2025, (11): 667-675.
DOI：

朱嵘华, 赵树龙, 张融圣, et al. 海上风电三筒导管架基础循环荷载响应特性试验研究[J]. 2025, (11): 667-675. DOI： doi:10.19912/j.0254-0096.tynxb.2024-1228.

摘要

为研究多筒导管架基础在循环荷载作用下的响应特性

在砂土地基中开展物理模型试验

分析了结构循环倾角、固有频率和阻尼比的变化。根据试验结果

提出基础累积转角经验预测公式。结果表明：循环荷载幅值的增大会加快基础倾角的累积速率。基础累积转角与加载次数在双对数坐标系中近似呈线性关系。结构的固有频率在不同循环荷载幅值加载条件下呈现了相似的变化规律

加载初期小幅增大

随着加载持续进行

固有频率急剧下降并围绕某一平均值波动。系统阻尼比在加载初期急剧下降至初始值的约20%

之后剧烈振荡

变化范围最大可达80%。

Abstract

Physical model tests were conducted in sandy soil to study the response characteristics of tripod bucket jacket foundations under cyclic loading. The cyclic rotation angle response

natural frequency

and damping ratio of the structure were analyzed. Based on the test results

an empirical prediction formula for the cumulative rotation angle of the foundation was proposed. The results indicate that an increase in cyclic load amplitude accelerates the accumulation rate of the foundation’s rotation angle. In a log-log coordinate system

the cumulative rotation angle of the foundation and the number of load cycles approximately exhibit a linear relationship. The natural frequency of the structure demonstrates a similar pattern of change under different cyclic load amplitudes： initially

there is a slight increase in the natural frequency

followed by a sharp decrease

and it then fluctuates around a certain average value as cyclic loading continues. The system's damping ratio sharply decreases at the beginning of loading

reducing to about 20% of the initial value

and then undergoes significant oscillations

with a variation of up to 80%.

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Keywords

references

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