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针对由压电智能结构构成的风电叶片振动逆控制技术进行理论分析和研究。首先设计压电复合材料叶片,将风力机叶片等效为扁壳结构,基于压电层合壳理论,推导压电扁壳的振动控制微分方程。在此基础上,把压电板壳风力机叶片简化成弹性压电层合壳,建立叶片智能结构机-电耦合系统动力学模型和压电复合材料压电扁壳结构的动力学方程,进行有限元分析,结果表明在风载作用下,控制电压对叶片振动有抑制作用。
Aiming at the theory analysis and research of wind turbine blade inverse control technology composed of piezoelectric smart structure. Firstly, the piezoelectric composite blade is designed and the blade of the wind turbine is equivalent to a flat shell structure. Based on the piezoelectric laminated shell theory, the differential equation governing the vibration of piezoelectric flat shell is deduced. On the basis of this, the leaflet of the piezoelectric plate shell is simplified into the elastic piezoelectric laminated shell, and the dynamic model of the blade intelligent structure-electric coupling system and the dynamic equation of the piezoelectric composite shell structure are established. The results of finite element analysis show that under the action of wind load, the control voltage can restrain blade vibration.