摘要
为了探求叶片平均频率对失谐叶盘振动响应的影响规律,采用有限元缩减模型分别对谐调叶盘和失谐叶盘进行振动响应分析,通过振动局部化因子对失谐叶盘振动局部化特性进行评估,获得了不同叶片平均频率和失谐标准差下叶盘系统的振幅和应变能分布,以及失谐叶盘振动局部化特性。结果表明:随着失谐标准差的增大,失谐叶盘振动幅值呈减小趋势,同时共振带变宽;在平均频率为1.0044时出现了严重的振动局部化现象,在失谐标准差为5%时,叶盘振动局部化程度较轻。
In order to explore the influence rule of blade mean frequency on the vibration response of mistuned bladed disk,the finite element reduction model was used to analyze the vibration response of tuned bladed disk and mistuned bladed disk,and the vibration localization characteristics of mistuned bladed disk were evaluated by vibration localization factor.The amplitude and strain energy distribution of the blade disk system with different blade mean frequency and mistuned standard deviation were obtained,and vibration localization characteristics of mistuned bladed disk were obtained.The results show that with the increase of mistuned standard deviation,the vibration amplitude of mis-tuned bladed disk decreases,and the resonance band widens.When the average frequency is 1.0044,there is a serious phenomenon of vibration localization,and when the mistuned standard deviation is 5%,the degree of vibration localization is lighter.
作者
张宏远
袁惠群
孙红运
ZHANG Hong-yuan;YUAN Hui-qun;SUN Hong-yun(School of Automobile and Traffic,Shenyang Ligong University,Shenyang 110159,China;School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China;Science and Technology Development Corporation,Shenyang Ligong University,Shenyang 110003,China)
出处
《航空发动机》
北大核心
2019年第6期41-45,共5页
Aeroengine
基金
国家自然科学基金(51775093)
中国博士后科学基金(2019M651147)
辽宁省自然科学基金(20170540782)
辽宁省高等学校基本科研项目(LG201713)资助
关键词
失谐叶盘
振动局部化
模态综合法
平均频率
压气机
航空发动机
mistuned bladed disk
vibration localization
modal synthesis method
mean frequency
compressor
aeroengine
