Modeling and Analyses of Rigid-flexible Coupled Structural Dynamics for Offshore Floating Wind Turbines

China Mechanical Engineering ›› 2016, Vol. 27 ›› Issue (04): 461-468.

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Modeling and Analyses of Rigid-flexible Coupled Structural Dynamics for Offshore Floating Wind Turbines

Peng Chunjiang1,2;Hu Yanping2;Cheng Junsheng;Shen Yiping2

1.湖南大学汽车车身先进设计制造国家重点实验室，长沙，410082
2.湖南科技大学，湘潭，411201

Online:2016-02-25 Published:2016-03-03
Supported by:

海上浮式风电机组刚柔耦合结构动力学建模与分析

彭春江1,2;胡燕平2;程军圣;沈意平2

1.State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha,410082
2.Hunan University of Science and Technology,Xiangtan,Hunan,411201

基金资助:
国家自然科学基金资助项目（51205124，51075131）

Abstract

Abstract:

A rigid-flexible coupled structural dynamics model was established for offshore floating wind turbines with three-bladed horizontal-axis-rotor based on Kane method combined with the mode superposition method. Firstly, the hydrodynamic load model was determined. Then, the flexible members such as tower and blades of wind turbines were discretized into multiple rigid unit. Partial velocity and partial angular velocity of each discrete element were expressed by using the mode superposition method. Last, the rigid-flexible coupled structural dynamics model was derived based on above work by using Kane method. The dynamic responses of the NREL 5-MW offshore baseline wind turbine were calculated using the established model along with the aerodynamic model and the hydrodynamic model. The output power, coupled characteristics of offshore floating wind turbines were compared with onshore's.

Key words: offshore floating wind turbine, Kane method, mode superposition method, structural dynamics modeling, rigid-flexible hybrid multibody

摘要：

基于凯恩方法和模态叠加法对三叶片水平轴海上浮式风电机组进行了刚柔耦合结构动力学建模和分析。首先建立浮式平台的水动力载荷模型，然后，把塔架和叶片等柔性件离散为有限个刚性单元体，并采用模态叠加法计算每一离散单元的偏速度和偏角速度，最后采用凯恩方法建立刚柔耦合结构动力学模型。以美国可再生能源实验室（NREL）海上5MW半潜式风电机组为算例，结合气动力载荷模型和水动力载荷模型对所建立的模型进行了风、浪响应计算，主要从输出功率、叶尖及塔顶振动信号的耦合特性两个方面对海、陆风电机组进行了对比。

关键词: 海上浮式风电机组, 凯恩方法, 模态叠加法, 结构动力学建模, 刚柔混合多体

CLC Number:

TK83

Peng Chunjiang, Hu Yanping, Cheng Junsheng, Shen Yiping. Modeling and Analyses of Rigid-flexible Coupled Structural Dynamics for Offshore Floating Wind Turbines[J]. China Mechanical Engineering, 2016, 27(04): 461-468.

彭春江, 胡燕平, 程军圣, 沈意平. 海上浮式风电机组刚柔耦合结构动力学建模与分析[J]. 中国机械工程, 2016, 27(04): 461-468.

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Modeling and Analyses of Rigid-flexible Coupled Structural Dynamics for Offshore Floating Wind Turbines

海上浮式风电机组刚柔耦合结构动力学建模与分析

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