海上风电复合筒型基础自振周期计算方法研究

doi:doi:10.19912/j.0254-0096.tynxb.2024-0741

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海上风电复合筒型基础自振周期计算方法研究

更新时间：2025-10-22

- 海上风电复合筒型基础自振周期计算方法研究
- Vol. 46, Issue 9, Pages: 51-57(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：doi:10.19912/j.0254-0096.tynxb.2024-0741
  CLC： P752
- Published Online：14 October 2025，
  
  Published：2025
- 稿件说明：
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[J]. 2025, 46(9): 51-57.
DOI：

[J]. 2025, 46(9): 51-57. DOI： doi:10.19912/j.0254-0096.tynxb.2024-0741.

摘要

基于气浮作用机理和结构动力学理论

考虑筒内气垫和筒内水塞的耦合作用

推导获得了复合筒型基础自振周期的计算公式

通过已有文献的试验值和计算值的比较

验证了该文计算方法的有效性和准确性。结果表明：通过气浮力折减系数考虑气垫-水塞的耦合质量特性

结合附加质量系数的合理取值范围对于精确预测复合筒型基础的自振周期是可行的;附加质量系数随着吃水的增加呈减小的趋势;充排气方式改变结构吃水来调整结构自振周期优于顶部压载方式。

Abstract

The composite bucket foundation is a commonly used type of foundation in the development of offshore wind power. Accurately evaluating its natural vibration period is crucial for the successful implementation of construction techniques such as air-floating towing

sinking

and floating. This paper derives a formula for calculating the natural vibration period of the composite cylinder foundation

taking into account the mechanism of air-floating

structural dynamics theory

and the coupling effect of the air cushion and water plug inside the bucket. The validity and accuracy of this calculation method are confirmed by comparing it to experimental and calculated values from existing literature. The results demonstrate that by considering the coupled mass characteristics of the air cushion and water plug

along with the air buoyancy decreasing coefficient and a reasonable range for the additional mass coefficient

it is possible to accurately predict the natural vibration period of the composite bucket foundation. The added mass coefficient decreases as the draft increases

and the charge and exhaust modes are more effective than the top ballast mode for adjusting the natural period of the structure by changing its draft.

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references

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