中文摘要：

利用金属基或陶瓷基硬涂层可以改变压气机叶片的固有特性,进而可以在某种程度上改善叶片的抗振动疲劳能力。针对具有压电和压磁效应的金属基和陶瓷基两类典型材料的硬涂层,采用有限元法对涂层-叶片复合材料结构进行模态分析,对比涂层厚度和涂覆位置等对叶片固有特性的影响。在涂层-叶片复合材料结构有限元建模中,涂层视为各向异性材料并考虑其电磁效应,叶片基体为各向同性材料。结果表明,两类硬涂层的厚度和涂覆位置都对叶片固有特性有明显影响,对弯曲振型影响较小,对扭转振型和高阶复合振型的影响较大。

英文摘要：

Hard coats with metal or ceramic substrate are effective to change the natural characteristics of a compressor blade so that to improve the anti-vibration fatigue capability.In this paper,the finite element method based modal analysis is achieved to investigate the contributions of the two different hard coats on the natural characteristics of a compressor blade.The two kinds of hard coats are modeled by both anisotropic materials and involving their piezoelectric or piezomagnetic effects.The blade is modeled as an isotropic one.Different coating thickness and coating area are compared with each other by the numerical results of the natural frequencies and modal vibration patterns of the composite blade.The obtained results show that the hard coats with different thickness and area have an important role in the natural characteristics of the blade,while changing weakly the bending modes and greatly the torsion and combined modes.