Vibration reduction of a woven composite fan blade by piezoelectric shunted devices

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Thierry, Olivier^1 ; De Smet, Olivier^1 ; Deü, Jean-François^1

Structural Mechanics and Coupled Systems Laboratory, Cnam, 292 rue Saint-Martin, Paris Cedex 03

75141, France^1

关键词: Coating material;    Electrical supply;    Good correlations;    Low frequency range;    Piezoelectric elements;    Vibration amplitude;    Vibration reductions;    Woven composite;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012164/pdf
DOI  :  10.1088/1742-6596/744/1/012164

来源: IOP

【 摘 要 】

This study concerns the vibration reduction in the low frequency range of a composite fan blade of a turbojet engine with piezoelectric devices. The interest is to increase lifespan and avoid flutter phenomena by reducing the vibration amplitude. The solution considered in the work consists in using piezoelectric elements connected to a passive electric circuit usually called shunt. The use of woven composite materials for fan blades enables to plan on embedding piezoelectric materials, for instance in the form of patches inserted between the composite and the coating material. The work presented during this conference will illustrate the feasibility of a piezoelectric shunted device integrated in an industrial application that doesn't require electrical supply. For such a structure, it is shown that a purely passive resonant shunt can significantly reduce the level of vibration of the second bending mode and that a good correlation between experiments and simulations validates the best fitting finite element model.