舰用燃气轮机压气机转子动力特性研究  

Dynamic Characteristics of Low-Pressure Compressor Rotor of Gas Turbine

作　　者：龚建政[1] 姜荣俊[1] 余又红[1] 贺星[1] 

机构地区：[1]海军工程大学船舶与动力学院,湖北武汉430033

出　　处：《燃气涡轮试验与研究》2012年第3期16-19,共4页Gas Turbine Experiment and Research

摘　　要：建立某型舰用燃气轮机压气机转子的有限元模型,对转子的动力学特性进行研究。计算了转子的固有频率和振型,求解了转子的临界转速和不平衡响应,并就转子前支承刚度变化对转子临界转速和不平衡响应的影响进行了分析。结果表明:转子为一刚性转子,其振动行为主要受转子一阶模态影响;转子的一阶临界转速为12 825 r/min;转子不平衡响应对第4级附近存在的不平衡量最敏感;转子前支承刚度增大对转子临界转速影响不大,但对转子不平衡响应有一定影响。本文结果可为燃气轮机的可靠运行及转子的进一步优化设计提供依据。The finite element model of compressor rotor of marine gas turbine was buih. Mode analysis of the rotor was done and critical speed and unbalance response of rotor were calculated. Influence on dynamic characteristics of rotor by increase in stiffness was analyzed. The results show the rotor is a rigid rotor. Vibration behavior of rotor is affected mainly by first mode. Critical speed of rotor is 12825drain. Unbalance response of rotor is most sensitive to unbalance at 4th disc. Results also show that critical speed of rotor is not sensitive to stiffness change, which yet has an effect on unbalance response of rotor. The conclusion provides references for optimization design of the rotor.

关 键 词：燃气轮机 转子动力学 有限元法 模态分析 坎贝尔图 

分 类 号：TK47[动力工程及工程热物理—动力机械及工程]