基于叶片贡献度的叶盘系统频率转向特性  

Characteristics of Frequency Veering for Mistuned Bladed Disks Based on the Contribution Degree of Bladed

作　　者：张宏远[1,2] 袁惠群[3] 杨文军[2] 赵天宇[2] ZHANG Hongyuan;YUAN Huiqun;YANG Wenjun;ZHAO Tianyu(School of Automobile and Traffic,Shenyang Ligong University Shenyang,110159,China;School of Mechanical Engineering & Automation,Northeastern University Shenyang,110819,China;School of Sciences,Northeastern University Shenyang,110819,China)

机构地区：[1]沈阳理工大学汽车与交通学院,沈阳110159 [2]东北大学机械工程与自动化学院,沈阳110819 [3]东北大学理学院,沈阳110819

出　　处：《振动．测试与诊断》2019年第2期334-339,445,共7页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金重点资助项目(51335003);国家自然科学基金资助项目(51775093);辽宁省自然科学基金资助项目(20170540782);辽宁省高等学校基本科研资助项目(LG201713);沈阳市科技创新专项资助项目(F15-199-1-01)

摘　　要：为了分析频率转向对失谐叶盘系统振动的影响,针对某型航空发动机压气机叶盘系统,采用子结构模态综合法建立了有限元缩减模型,从应变能角度分析了叶盘系统的频率转向特性,计算了失谐叶盘系统模态振动贡献度因子和局部化因子。通过不同频率转向间隙对应的失谐叶盘系统受迫振动响应贡献度因子与局部化因子,分析了频率转向间隙和叶片贡献度因子对失谐叶盘系统局部化的影响。结果表明,频率转向对失谐叶盘系统振动局部化影响显著,在频率转向区域,失谐叶盘系统的振动局部化程度较高;随着频率转向间隙变化,叶片应变能对失谐叶盘系统局部化的贡献度呈现一定的规律性。A sub-structure model of aero-engine compressor′s bladed disks is established.Considering the non-linear contact problem of tenon and mortise,the frequency veering characteristic of the bladed disks from the perspectives of the strain energy is analyzed.Then,the modal vibration contribution degree factor and localization factor of the mistuned bladed disks are calculated,as well as the forced vibration response contribution degree factor and localization factor on the frequency veering distance of the mistuned bladed disks.The relationship of the frequency veering distance and contribution degree factor for the mistuned bladed disks localization is studied,and the results indicate that the frequency veering had a significant effect on the mistuned bladed disks localization,the degree of the localization is relatively high in the region of frequency veering.The contribution degree of bladed strain energy on the mistuned bladed disks changes along with the frequency veering distance.

关 键 词：失谐叶盘 频率转向 局部化 应变能 贡献度 

分 类 号：TH113[机械工程—机械设计及理论] O342[理学—固体力学]