摘要
针对燃气轮机叶片颤振问题,在建立叶片弯扭耦合动力学模型的基础上,进行燃气轮机叶片的二自由度特性分析。利用数值研究方法,对燃气轮机叶片进行动力学分析,对不同来流速度下的燃气轮机叶片振动响应进行计算,得到了发生Hopf分岔的临界来流速度。分析系统的位移响应和相轨迹,所获得的结果为燃气轮机叶片设计、改进及运行管理中避免颤振的发生提供了决策依据。
Aiming at the flutter problem of gas turbine blades,the two-degree-of-freedom analysis of gas turbine blades is carried out based on the dynamic model of blade bending-torsion coupling.The numerical analysis method is used to analyze the dynamics of gas turbine blades,the vibration response of gas turbine blades at different inflow velocities is calculated,and the critical inflow velocity at which Hopf bifurcation occurs is obtained.The displacement response and phase trajectory of the system are analyzed,and the obtained results provide decision-making basis for avoiding chattering in the design,improvement and operation management of gas turbine blades.
作者
杨睿
贺星
刘永葆
李默
YANG Rui;HE Xing;LIU Yong-bao;LI Mo(Military Key Laboratory for Naval Ship Power Engineering,Naval University of Engineering,Wuhan 430033,China;College of Power Engineering,Naval University of Engineering,Wuhan 430033,China)
出处
《机械工程与自动化》
2019年第5期19-21,共3页
Mechanical Engineering & Automation
关键词
燃气轮机
叶片
二自由度
颤振
动力学
gas turbine
blade
two degrees of freedom
flutter
dynamics
