基于PIHISCMSM失谐叶盘振动特性研究  

Study on Vibration Characteristics of Mistuned Blisk Based on PIHISCMSM

作　　者：孙红运 袁惠群[2] 赵天宇[2] SUN Hong-yun;YUAN Hui-qun;ZHAO Tian-yu(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China;School of Sciences,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]东北大学理学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2020年第12期1733-1740,共8页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51775093);国家自然科学基金青年基金资助项目(51805076)

摘　　要：针对新型航空发动机盘片轴一体化复杂转子系统的耦合振动问题,提出考虑预应力的改进混合界面模态综合法(PIHISCMSM),通过模态分析验证了该方法的准确性.基于Isight软件集成APDL语言,建立了叶盘系统CAD/CAE参数化驱动有限元分析平台,研究了不同叶片厚度失谐叶盘系统的动力学特性.研究表明,同种失谐模式下,叶片厚度不同时,叶盘系统的模态局部化因子对于不同模态振型的敏感程度不同,随着叶片厚度增加,叶片主导振动频率增大,叶盘系统的共振频率增加,共振峰值下降,增加叶片厚度能够降低失谐叶盘系统的振动响应局部化程度.In order to investigate coupling vibration characteristics of new structure aero-engine disc-blade-shaft integration system,an improved hybrid interface substructural component modal synthesis method with prestress(PIHISCMSM)was proposed,and the accuracy of dynamics analysis results was verified by modal analysis.Based on the Isight software integrated APDL language,a CAD/CAE parameter driven finite element analysis platform for blisk system was established.The dynamic characteristics of mistuned blisk system with different blade thickness was studied.The results show that,under the same mistuning pattern,for blisk system with different blade thickness,the sensitivity degree of modal localization factor to different modal order is different.With the increase of blade thickness,the frequency of blade dominant vibration increases,the resonance frequency of blisk system increases,the resonance peak decreases,and the increase of blade thickness can reduce the vibration response localization degree of the mistuned blisk system.

关 键 词：失谐叶盘 模态综合法 振动特性 应变能 

分 类 号：O327[理学—一般力学与力学基础]