高转速涡轮发动机转子临界转速计算  

Critical speed calculation of high speed turbine engine

作　　者：韩涛翼 李纪永 赵彧 熊杰 李芳 HAN Taoyi;LI Jiyong;ZHAO Yu;XIONG Jie;LI Fang(Sichuan Aerospace Zhongtian Power Equipment Co.,Ltd,Chengdu 610100,China)

机构地区：[1]四川航天中天动力装备有限责任公司,四川成都610100

出　　处：《西北工业大学学报》2021年第S01期47-53,共7页Journal of Northwestern Polytechnical University

摘　　要：当涡轮发动机工作转速与临界转速重合时会发生共振,因此需对涡轮发动机的临界转速进行计算。基于此,对某型高转速涡轮发动机的临界转速进行了求解。将转子支承结构分为支架和轴承两部分,其中分析了转子的传力路径,并简化了支架三维模型,采用ANSYS对支架进行静力学分析和谐响应分析,得到了支架静刚度和动刚度。通过支架刚度和轴承刚度耦合得到了综合静刚度和综合动刚度,进而得到综合静、动刚度下,转子的各阶振型和临界转速。结果表明:支架静刚度不随载荷的变化而变化,支架动刚度随转速增加而减小,综合动刚度下的转子临界转速高于综合静刚度下的转子临界转速,可为今后的研究提供参考。During the working process of the turbine engine,its working speed coincides with the critical speed leading to resonance,so it is necessary to calculate the critical speed.Based on this,the critical speed of a high speed turbine engine is solved.In this paper,the supporting structure can be divided into two parts:bracket and bearing.The force transmission path of the rotor is analyzed,and the 3D model of the bracket is simplified.Finally,the static and dynamic stiffness of the bracket are computed by static analysis and harmonic response analysis using ANSYS.The comprehensive static stiffness and comprehensive dynamic stiffness are obtained through coupling bracket stiffness and bearing stiffness.Then the rotor mode shapes and critical speed under the comprehensive static and dynamic stiffness are acquired.The results show that the static stiffness of the bracket is unchanged with the load,but the dynamic stiffness of the bracket decrease when the rotation speed increase.The critical speed of the rotor calculated through the comprehensive dynamic stiffness is higher than that of utilizing the comprehensive static stiffness,which can provide a reference for future research.

关 键 词：转子系统 动刚度 静刚度 临界转速 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]