涂敷硬涂层的整体叶盘振动特性与阻尼解析分析  

Analytical analysis for vibration characteristics and damping of a hard-coating blisk

作　　者：高峰[1,2] 孙伟 GAO Feng;SUN Wei(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China;Key Laboratory of Vibration and Control of Aero-Propulsion System Ministry of Education, Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819 [2]东北大学航空动力装备振动及控制教育部重点实验室,沈阳110819

出　　处：《振动与冲击》2018年第20期1-7,14,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51375079);中央高校基本科研业务费项目(N150304008)

摘　　要：为了解决干摩擦阻尼黏弹在整体叶盘减振实施困难的问题,提出一种对叶片涂敷硬涂层的阻尼减振方法并进行了验证。创建了涂敷硬涂层的整体叶盘复合结构连续参数模型;基于Oberst梁和复模量理论推导了涂敷硬涂层的叶片的等效参数表达式,并利用里兹法求解了复合结构的固有特性;以叶片单面涂敷NiCoCrAlY+YSZ硬涂层的整体叶盘为研究实例进行数值计算,并与实验数据进行比较,同时研究了硬涂层对整体叶盘固有特性的影响,尤其是硬涂层厚度与面积对整体叶盘阻尼能力的影响。研究结果表明,NiCoCrAlY+YSZ硬涂层对固有频率有微小影响,变化范围在3%左右,但对模态损耗因子有着显著影响,大约增加了6倍,整体叶盘的共振响应受到明显抑制。To solve the difficulty of dry friction damper implementation in vibration reduction of a blisk(integral bladed disk),a novel damping improvement method by depositing hard coating on blades was proposed and then verified in this study.Firstly,a continuous parameter model(CPM)of the composite structure of the hard-coating bladed disk was established.Then,equivalent parameters of the hard-coating blades were derived based on the Oberst beam and the complex modulus theories.Further,natural characteristics of the hard-coating blisk were obtained by using of the Ritz method.Finally,a blisk with depositing NiCoCrAlY+YSZ hard coating on single side of blades was taken to conduct numerical calculation.The results were compared with those obtained by experiment tests.Moreover,the influence of hard coating on natural characteristics of the hard-coating blisk was discussed,respectively.The influence of coating thickness and area on damping capacity were studied emphatically.Results reveal that the NiCoCrAlY+YSZ hard coating has a significant effect on modal loss factors(improve six times approximately),with slightly altering the natural frequencies(around 3%).The resonant response of the blisk can be suppressed remarkably.

关 键 词：整体叶盘 硬涂层 复合结构 振动特性 涂层参数 阻尼能力 

分 类 号：TJ650.3[兵器科学与技术—武器系统与运用工程] TB535[理学—物理]