摘要
本文针对支承动刚度对某涡轴发动机燃气发生器转子临界转速的影响进行了研究。采用实体单元建立了某涡轴发动机燃气发生器转子支承系统的有限元分析模型,运用ANSYS软件对支承系统的静刚度和动刚度进行了计算,随后计算了燃气发生器转子在静刚度和动刚度条件下的临界转速,并对临界转速进行了对比分析。研究表明:支承动刚度使转子的各阶临界转速均有不同程度的下降。因此,在使用静刚度进行转子系统临界转速设计时应再预留一定的裕度。
The influence of the support dynamic stiffness on critical speeds of a gas generator rotor of a turbine engine is analysed. After establishing a finite element model of the support system using solid elements, the static stiffness and dynamic stiffness of the support system were determined by ANSYS software. The critical speeds of the gas generator rotor under static and dynamic stiffness conditions were analyzed and compared. The results show that the dynamic stiffness decreases the critical speeds of the rotor. Therefore, the design margin of the rotor critical speeds with static stiffness should be corrected. The results obtained in this paper can provide a reference for critical speed design of aero engines.
作者
龙伦
吕彪
袁巍
Lun Long;Biao Lv;WeiYuan(AECC Hunan Avation PowerPlant Research Institute;Aviation Key Laboratory of Aero-engine Vibration Technology)
出处
《风机技术》
2018年第2期66-70,共5页
Chinese Journal of Turbomachinery
关键词
涡轴发动机
燃气发生器转子
静刚度
动刚度
临界转速
turbine engine
gas generator rotor
static stiffness
dynamic stiffness
critical speed
