摘要
以某航空发动机带机匣双转子试验器为参考,分别采用截锥壳元素法和Timoshenko梁理论对其机匣和双转子系统进行了有限元建模,得到了试验器的整机有限元模型.研究了机匣参数对双转子航空发动机整机动力学特性的影响.研究结果表明:随机匣-转子质量比的增大,机匣的振动先减小后增大,从优化整机振动响应角度出发存在最佳质量比,当机匣-转子质量比约等于0.45时,整机系统的振动最小;采用不同材料的机匣对整机系统的临界转速影响不大,但对整机系统振动具有一定影响,当机匣采用合金钢时,整机系统的振动最小,采用铝合金时,整机系统的振动最大.
Taking the experimental apparatus of dual rotor-bearing-casing aero-engine as the reference,the finite element model of casing and dual-rotor is established by using truncated conical shell element method and Timoshenko beam theory,separately,and the finite element model of whole aero-engine experimental apparatus has been got. The influence of casing parameters on whole aero-engine is studied. The research shows that with the increasing casing-rotor mass ratio,the vibration amplitude of casing decreased first and then increased. From the standpoint of optimizing the vibration amplitude of whole aero-engine,there is an optimum mass ratio. When casing-rotor mass ratio is about 0. 45,the vibration amplitude is minimum. Different casing material has negligible effects on the critical speed,but it can influence the vibration amplitude of whole aero-engine.The vibration amplitude is minimum when alloy steel casing is used,and the vibration amplitude is maximum whenaluminum alloy casing is used.
作者
孟照国
王昊
秦海勤
徐可君
Meng Zhaoguo;Wang Hao;Qin Haiqin;Xu Kejun(Qingdao University of Science and Technology,Mechanical and Electrical Engineering;School of Naval Aviation Engineering Institute,Department of Aviation Mechanism in Qing Institute,Qingdao 266061,China）dao Branch,Qingdao 266041,China)
出处
《动力学与控制学报》
2018年第3期258-264,共7页
Journal of Dynamics and Control
关键词
航空发动机
机匣
整机振动
双转子
aero-engine
casing
whole aero-engine vibration
dual-rotor
