兆瓦级风机停机状态塔筒风致响应均值半经验计算方法

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (16) : 267-274.

论文

黄国庆1，袁酊1，刘敏1，许楠2

作者信息 +

Semi empirical calculation method for mean wind-induced response of megawatt wind turbine tower in parked condition

HUANG Guoqing1, YUAN Ding1, LIU Min1, XU Nan2

Author information +

文章历史 +

摘要

风机的响应通常是根据建设场地的风场参数，通过数值仿真软件或解析公式进行估计。相比数值仿真软件，半经验方法在保证一定计算精度的条件下，计算效率高，具有快速预估风机结构响应、指导风机塔筒选型的优势。在日本《风力发电塔架结构设计指南》基础上，基于柔性塔筒刚性叶片假设采用准定常理论推导了变桨距控制风机在停机状态时塔筒基底弯矩均值的解析表达式。然后以5 MW陆上风机为例，通过比较解析表达式与采用OpenFAST软件数值仿真的计算结果，对解析公式应用于5 MW风机的适用性进行了校核。计算结果表明，大型兆瓦级风机叶片和塔筒变形相比小型风机大大增加，导致了解析表达式具有一定的误差。针对大型风机误差产生的原因提出了解析表达式的基底弯矩均值半经验方法，以提高其计算精度。

Abstract

The response of a wind turbine is usually estimated by numerical simulation software or analytical formulas based on the wind field parameters of the construction site.Comparing with numerical simulation software, analytical formulas have higher efficiency ensuring certain calculation accuracy as well as the advantages of quickly predicting the structural response of the wind turbine to guide the selection of the wind turbine tower.This article assumes a flexible tower and rigid blades basing on the Wind Power Tower Structure Design Guide.It takes the quasi-steady theory to derive the analytical formula for the mean value of the tower base bending moment of variable pitch control wind turbine.Then taking a 5 MW onshore wind turbine as an example, this paper tested the accuracy by comparing the calculation results of the analytical formulas with that of OpenFAST, checking the applicability of the analytical formula applied to 5 MW wind turbines.The calculation results show that the deformation of blades and towers of large megawatt wind turbines is greatly increased compared with that of small wind turbines, resulting in a certain error in the analytical formula.Finally, based on the reason, a correction method for bending moment analytical formulas was proposed, which can improve its calculation accuracy.

导出引用

黄国庆，袁酊，刘敏，许楠. 兆瓦级风机停机状态塔筒风致响应均值半经验计算方法[J]. 振动与冲击, 2021, 40(16): 267-274

HUANG Guoqing, YUAN Ding, LIU Min, XU Nan. Semi empirical calculation method for mean wind-induced response of megawatt wind turbine tower in parked condition[J]. Journal of Vibration and Shock, 2021, 40(16): 267-274

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