期刊论文

中文

中南大学学报(自然科学版)

1672-7207

2024

55

01

346-354

10.11817/j.issn.1672-7207.2024.01.028

本校为其他机构

为有效掌握风荷载作用下风力发电机地基的复杂应力分布,提出关于基底应力平面分布假定的修正方法.以相似法则为理论基础,建立山区风力发电机地基缩尺物理模型试验系统,模拟不同平均风速和脉动风时间步长时的水平风荷载,测试不同风荷载下的基底静压力和动压力,研究应力的分布模式、变化规律,提出基底应力的平面度修正方法.研究结果表明:风速越大,基底静压力越大;而当风速一定时,基底各点的压力差异随着时间步长增加而加大,因此,低频脉动风更容易威胁地基稳定性;在不同工况下,动压力仅为静压力的1/20～1/12,故可采用拟静力法对风力机基底应力进行计算;若按常用的建筑规范基底应力计算方法,会低估基...

In order to effectively acquire the complex stress distribution of the wind turbine foundation under the wind load,a correction method for hypothesis of foundation stress plane distribution was put forward.The principle of similarity was used as the theoretical basis to establish a scaled physical model system of the foundation of wind turbines in mountainous areas.Horizontal wind loads with different mean wind speeds and time steps of fluctuating wind were simulated.The foundation static and dynamic pressure under different working conditions was tested,and the distribution mode and evolution...