Lamb波检测法及其在风机叶片结构健康监测中的应用

Damage Detection Based on Lamb Wave and Its Applications in the Structure Health Monitoring of Wind Turbine Blades

叶片是风力发电机最为关键的部件之一,由于其所处自然环境相对恶劣,服役工况复杂,导致其易出现各种形式的损伤,且损伤后维护更换的费用高昂。为解决这一问题,提高风机叶片耐久性的最好方法是应用各种结构健康监测技术对叶片的状态进行实时监测。Lamb波检测方法以其独有的特性和优点,在风机叶片的结构健康监测研究中得到广泛应用。综述了Lamb波检测方法的基本原理及其在风机叶片结构健康监测中的应用概况,并探讨了今后需要关注的问题。

Renewable energy is one of the most efficient and effective ways to deal with global warming and energy crisis. Wind energy as one of such renewable energy alternatives has seen a substantial growth. Blades, one of the key components of wind turbine system, are very sensitive to damage. Specific environmental conditions together with large costs of their failure result in intensive research that aims to ensure their safe and long-time operation. An interesting approach used to increase the strength and durability of wind turbine blades comes from the application of various structural health monitoring （SHM） techniques. A very promising SlIM technique used nowadays for the purpose is the technique based on the propagation of guided I.amb waves and their coupled interaction with damage. This paper details the damage detection method based on Lamb wave and the research status of structural health monitoring （SHM） for wind turbine blades based on Lamb wave, and finally proposes desirable developments for further advancement of this field.