随机风载荷下大型风力机叶片/机舱/塔架耦合动力学分析  

Coupling dynamics analysis on blades/nacelle/tower of large-scale wind turbine with stochastic wind load

作　　者：李永建[1] 殷玉枫[1] 丁健刚[1] 王谦[1] 

机构地区：[1]太原科技大学机械工程学院,山西太原030024

出　　处：《可再生能源》2014年第7期992-997,共6页Renewable Energy Resources

基　　金：山西省科技攻关项目(20100321058-01)

摘　　要：由于风力机叶片所受风力来流的随机性和风力机结构的复杂性,大型风力机在随机风载荷下的动力学行为分析一直是风电行业急需解决的难题之一。利用MATLAB/Simulink对随机风速进行了模拟,通过柔性多体动力学方法建立了符合实际的风力机叶片/机舱/塔架耦合动力学方程。在随机风载荷下对目前国内1.5 MW主流风力机的叶片、塔架的动力学行为进行了实例分析,得到了10 min时序随机风载下的叶片挥舞位移、速度历程和塔架的位移、速度历程。分析结果表明,在随机风载下,风力机启动时叶片、塔架振动较为剧烈,随时间的增加叶片、塔架振动幅度逐渐减小,振动速度也呈减小趋势。该研究结果为我国风力机设计理论的完善和工程实践奠定了一定的基础。Dynamics response of large-scale wind turbine to stochastic wind loads is always an urgent and awkward problem in wind power industry, due to its sophisticated structure and randomness of wind. MATLAB/Simulink is used to simulate stochastic wind speed and coupling dynamic equations for blades/nacelle/tower of practical wind turbine are established by flexible multi-body dynamics. Taking1.5MKW mainstream wind turbine at home currently for example, dynamics analysis of blades and tower with stochastic wind loads for 10 minutes period is taken to obtain blades flapping displacement,velocity, angular velocity history and tower displacement, velocity history with stochastic wind loads,which presents that blades and tower of wind turbine vibrate strongly when it starts, amplitude of blades and tower are decreased gradually as well as vibration velocity over time. This conclusion could lay certain foundation for developing the design theory of wind turbine and engineering practice in China.

关 键 词：风力机 MATLAB/SIMULINK 柔性多体 耦合动力学 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]