海上风电机组预应力复材双壁塔架结构分析与设计
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1.北京金风科创风电设备有限公司;2.香港理工大学土木及环境工程学系,中国香港

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TU398

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国家自然科学(52308212)


Study on Structural Analysis and Design Method of Hybrid FRP-Concrete-Steel Prestressed Double-Skin Wind Turbine Towers
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Affiliation:

1.Goldwind Science and Creation Wind power Equipment Co,Ltd,Beijing;2.Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong,China

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    摘要:

    我国海上风电进入规模化、高效化开发阶段,支撑海上大型风电机组需要结构性能更好和经济性更优的新型塔架形式。预应力复材双壁风电塔架是香港理工大学研发的一种以圆形截面的纤维增强复合材料-混凝土-钢双壁空心构件为基本构件的新型塔架,具有耐久性好、承载力大以及稳定性高等特点,可以期望降低生产及维护成本,提高塔架服役全寿命周期的经济性。本文以支撑12MW海上风电机组的预应力复材双壁塔架为实例,基于现行设计标准和规范的要求,详细阐述了预应力复材双壁塔架结构的设计过程。设计结果表明:预应力复材双壁塔架的固有频率能够符合风电机组要求而不发生共振;塔架具有较高的压弯、受剪和受扭承载力,满足承载能力极限状态要求;塔架在正常使用极限状态下的应力、应变、混凝土裂缝宽度及塔顶变形均小于现行规范限值;采用一种简化方法评估了塔架截面的疲劳性能,截面钢管和混凝土均符合疲劳要求。本文内容可以为预应力复材双壁风电塔架的设计和工程应用提供参考。

    Abstract:

    China's offshore wind power sector is rapidly progressing with large-scale and efficient projects. To support large-capacity wind turbines (LWTs), there is an increasing need for advanced tower structures that offer superior structural performance and economic efficiency. One such innovative solution is the hybrid fiber-reinforced composite materials (FRP)-concrete-steel prestressed double-skin wind turbine towers, which can be termed PDSWTs hereafter. PDSWTs, proposed by scholars of The Hong Kong Polytechnic University, incorporate circular FRP-concrete-steel double-shin tubular members (hybrid DSTM) as the basic component. PDSWTs boast excellent durability, high load-bearing capacity, and exceptional stability, resulting in the potential to reduce production and maintenance costs throughout the service life. This paper presents a study on the design procedures of PDSWTs using a tower that supports 12MW offshore LWT as an example, based on the provisions in the current design standards and codes. The results demonstrate that: the tower successfully meets the frequency requirements of LWT that can avoid encountering resonance; the tower possesses high ultimate resistance under compression-bending, shear and torsional loadings of ultimate limit states; the strain, stress, crack width and tower deformation under serviceability limit states meet the requirements of current design standards; furthermore, a simplified method is proposed to check the fatigue resistance of steel and concrete in the tower sections. This paper is expected to provide references for the design and application of PDSWTs.

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齐涛,邓然,向宇,等. 海上风电机组预应力复材双壁塔架结构分析与设计[J]. 科学技术与工程, , ():

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  • 收稿日期:2023-12-10
  • 最后修改日期:2024-07-01
  • 录用日期:2024-07-09
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