扇级凸肩叶片流固耦合振动响应分析  

Analysis of fluid-structure coupling vibration of fan-stage blade with shoulder

作　　者：韩刚[1] 郭美荣 刘瑞 乔羽 HAN Gang;GUO Mei-rong;LIU Rui;Qiao Yu(School of Mechanical and Electronic Engineering,Qiqihar University,Heilongjiang Qiqihar 161006,China;Three Tree Rolling Stock Depot,China Railway Harbin Group Co.,Ltd.,Heilongjiang Jiamusi 154000,China)

机构地区：[1]齐齐哈尔大学机电工程学院,黑龙江齐齐哈尔161006 [2]中国铁路哈尔滨局集团有限公司三棵树车辆段,黑龙江佳木斯154000

出　　处：《齐齐哈尔大学学报（自然科学版）》2023年第6期15-20,共6页Journal of Qiqihar University(Natural Science Edition)

基　　金：黑龙江省教育厅基本业务专项(135109208)。

摘　　要：在ANSYS Workbench中,联合Transient Structural和CFX模块对航空发动机扇级叶片进行双向流固耦合振动行为研究。分析叶片转速和凸肩结构对叶片模态频率、模态振型以及气弹稳定性的影响。结果表明,转速增加对叶片的预应力模态频率提高显著,但对模态振型的改变微乎其微。施加凸肩结构不仅能提高模态频率,而且对模态振型改变较大,明显地减小了振动位移。在叶片上,合理的凸肩安装位置不仅能提高叶片气弹稳定性和运行的平稳性,而且能降低高周疲劳破坏的几率。In ANSYS Workbench,Transient Structural and CFX modules were used to study the two-way fluid-structure coupling vibration behavior of a fan-stage blade of the aeroengine.The influence of the blade rotation speed and shoulder on the modal frequency,the mode shape and the aeroelastic stability of the blade is analyzed.The results show that the prestressed mode frequency of the blade increases significantly with the increase of rotational speed,but the mode shape of the blade changes little.However,the application of shouldered structure in the blade can not only increase the mode frequency of the blade,but also change the mode shape of the blade greatly,and obviously reduce the vibration displacement of the blade.The aeroelastic stability and running smoothness of the blade can be improved,and also the probability of high-cycle fatigue failure of the blade can be reduced due to a reasonable position of the shoulder in the blade.

关 键 词：凸肩叶片 气弹稳定性 非线性振动 双向流固耦合 ANSYS Workbench 

分 类 号：TH113.1[机械工程—机械设计及理论]