基于有限元法的硬涂层-整体叶盘振动特性

基于有限元法研究了硬涂层-整体叶盘的振动特性和硬涂层的阻尼减振性能.首先，基于能量法、复合Mindlin板理论和复模量理论建立了硬涂层-整体叶盘结构的动力学方程;其次，求解了硬涂层-整体叶盘结构的模态特性和振动响应;最后，以叶片涂敷NiCoCrAlY+YSZ硬涂层的整体叶盘为实例，从理论和实验两方面校验有限元模型和硬涂层对整体叶盘的影响.结果表明，NiCoCrAlY+YSZ硬涂层对整体叶盘固有频率的影响微弱，但是有较强的阻尼增强效应，能够显著抑制振动响应.

Vibration Characteristics Study for the Hard Coating Blisk Using Finite Element Method

Vibration characteristics of hard coating blisk and the damped vibration reduction of hard coating were investigated using finite element method. Firstly， the equation of motion of hard coating blisk was achieved according to the energy method and the Mindlin plate theory and the complex modulus theory; then， modal characteristics and forced vibration response of hard coating blisk were solved; finally， a blisk with NiCoCrAlY+YSZ deposition hard coating on both sides of blades was taken as study case， the finite element model of hard coating blisk was validated by the theoretical analysis and experimental test. The results reveal that the NiCoCrAlY+YSZ hard coating has weak effect on natural frequencies， but a strong damping effect on the blisk， and forced responses of the blisk were suppressed remarkably by the NiCoCrAlY+YSZ hard coating.