考虑RNA运行作用的近海风电结构动力响应分析

白久林; 李晨辉; 龚彦安; 王宇航

doi:10.6052/j.issn.1000-4750.2021.06.0453

考虑RNA运行作用的近海风电结构动力响应分析

doi: 10.6052/j.issn.1000-4750.2021.06.0453

白久林^{1, 2, ,},
李晨辉^1,,
龚彦安^1,,
王宇航^1,

1.
山地城镇建设与新技术教育部重点实验室(重庆大学)，重庆 400045
2.
大连理工大学海岸和近海工程国家重点实验室，大连 116024

基金项目: 高等学校学科创新引智基地项目(B18062)；海岸和近海工程国家重点实验室开放基金项目(LP2010)

详细信息

作者简介:
李晨辉(1997−)，男，陕西人，硕士生，主要从事风电结构防灾减灾研究(E-mail: lchoverloaded@163.com)

龚彦安(1995−)，男，江西人，硕士生，主要从事风电结构防灾减灾研究(E-mail: antonio010010@163.com)

王宇航(1985−)，男，重庆人，教授，博士，博导，主要从事组合结构研究(E-mail: wangyuhang@cqu.edu.cn)m

通讯作者:
白久林(1985−)，男，四川人，副教授，博士，博导，主要从事建筑结构抗震减震研究(E-mail: baijiulin@cqu.edu.cn)

中图分类号: TU311.3；TM315
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- 文章访问数: 224
- HTML全文浏览量: 68
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- 被引次数: 0
出版历程
- 收稿日期: 2021-06-15
- 修回日期: 2021-09-02
- 网络出版日期: 2021-09-17
- 刊出日期: 2022-11-01

DYNAMIC RESPONSE ANALYSIS OF OFFSHORE WIND TURBINE CONSIDERING ROTOR-NACELLE ASSEMBLY (RNA) OPERATION

BAI Jiu-lin^{1, 2
, ,},
LI Chen-hui^1
,,
GONG Yan-an^1
,,
WANG Yu-hang^1
,

1.
Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Chongqing 400045, China
2.
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China

摘要

摘要: 在风、浪的长期耦合作用下，海上风电结构的振动问题不仅会影响发电机组的电能输出，还会加剧结构的累积疲劳损伤，危害结构安全。为更加科学、合理地认识近海风电结构的动力特性，该文通过考虑风轮-机舱组件(rotor-nacelle assembly, RNA)运行作用及风、浪相关性，采用Von Karman风谱模型模拟湍流风场并计算气动荷载，通过莫里森方程求取单桩基础结构的波浪荷载，对NREL 5MW单桩风电塔进行动力响应分析，对比其在不同状态下的动态行为模式；通过批处理程序，开展对近海风电结构在3 m/s~30 m/s风速范围内的响应计算，探究RNA运行作用下近海风电结构位移、加速度响应随风速的变化规律。结果表明：近海风电结构在不同工作状态下的动力响应具有不同的频谱特征，其位移、加速度峰值响应会被RNA运行作用放大。
- 近海风电结构 /
- RNA运行作用 /
- 风-浪相关性 /
- 气动荷载 /
- 波浪荷载 /
- 动力响应
Abstract: Caused by the long-term coupling effect of wind and wave, the vibration of offshore wind turbine will affect the power output of the generator unit, aggravate the cumulative fatigue damage of the structure and reduce the safety of the structure. In order to understand the dynamic characteristics of offshore wind turbine more scientifically, this paper uses von Karman wind spectrum model to simulate the turbulent wind field and calculate the aerodynamic load by considering the Rotor–Nacelle Assembly (RNA) operation and the correlation between wind and wave, and calculates the wave load at monopile foundation structure by Morrison equation. The dynamic response of NREL 5MW monopile wind turbine is analyzed, and the dynamic behavior patterns under different states are compared. Through batch processing program, the response of offshore wind turbine with the wind speed range of 3 m/s~30 m/s is calculated, and the variation laws of displacement and acceleration response of offshore wind turbine with wind speed under RNA operation are explored. The results show that the dynamic response of offshore wind turbine under different working conditions has different spectrum characteristics, and the peak response of displacement and acceleration will be amplified by RNA operation.
- offshore wind turbine /
- RNA operation effect /
- wind-wave correlation /
- aerodynamic load /
- wave load /
- dynamic response

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图 1 转速、桨距角控制策略

Figure 1. Control strategy of rotor speed and pitch angle

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图 2 OpenFAST计算模块

Figure 2. OpenFAST calculation module

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图 3 Turbsim风场

Figure 3. Turbsim wind field

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图 4 叶素翼型气动矢量图

Figure 4. Vectors of aerodynamic forces at the airfoil of blade element

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图 5 工况1风浪条件

Figure 5. Wind and wave condition of case 1

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图 6 NREL 5MW单桩风电塔切入状态下响应时程

Figure 6. Response time history in cut-in state of NREL 5MW monopile

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图 7 切入状态位移、加速度响应频谱图

Figure 7. Spectrum of displacement and acceleration response in cut-in state

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图 8 NREL 5 MW单桩风电塔额定状态下响应时程

Figure 8. Response time history in rated state of NREL 5 MW monopile

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图 9 额定状态位移、加速度响应频谱图

Figure 9. Spectrum of displacement and acceleration response in rated state

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图 10 NREL 5 MW单桩风电塔停机状态下响应

Figure 10. Dynamic response in cut-out state of NREL 5 MW monopile

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图 11 塔顶前后向及侧向位移与加速度随风速变化趋势

Figure 11. Variation trend of fore-aft & side-side displacement and acceleration of tower top with wind speed

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图 12 塔顶前后向及侧向主频幅值随风速变化趋势

Figure 12. Variation trend of fore-aft & side-side main frequency amplitude of tower top with wind speed

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图 13 对比模型塔顶前后向及侧向位移与加速度随风速变化趋势

Figure 13. Variation trend of fore-aft & side-side displacement and acceleration of tower top of 3 models with wind speed

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图 14 对比模型塔顶前后向及侧向主频幅值随风速变化趋势

Figure 14. Variation trend of fore-aft & side-side main frequency amplitude of tower top of 3 models with wind speed

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表 1 NREL 5MW单桩风电塔参数

Table 1. Parameters of NREL 5MW monopile

参数	取值	参数	取值
额定功率	5 MW	塔顶截面直径	3.87 m
塔筒高度	87.6 m	塔底截面直径	6 m
风轮直径	126 m	叶片长度	61.5 m
轮毂高度	90 m	轮毂直径	3 m
塔筒质量	347 600 kg	塔筒壁厚	19 mm~27 mm
风轮质量	110 000 kg	单桩高度	20 m
机舱质量	240 000 kg	单桩直径	6 m
切入风速	3 m/s	单桩壁厚	27 mm
额定风速	11.4 m/s	切入转速	6.9 r/min
切出风速	25 m/s	额定转速	12.1 r/min

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表 2 NREL 5MW单桩风电塔特征频率

Table 2. Characteristic frequency of NREL 5MW monopile wind turbine

特征项	频率/Hz
塔架侧向一阶	0.275
塔架前后向一阶	0.278
叶轮3P，7 m/s	0.435
叶轮3P，11.4 m/s	0.606

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表 3 工况条件

Table 3. Case condition

工况	平均风速/(m/s)	有义波高/m	谱峰周期/s	状态
1	7	0.81	6.14	切入
2	18	2.42	7.32	额定
3	28	5.33	8.30	停机

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表 4 对比模型

Table 4. Comparison model

模型	桨距角	转速	电机
M1	变桨	变速	运行
M2	风速相关	0	停机
M3	0	0	停机

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