转子热致振动现象的瞬态响应特性研究  

Transient response characteristics of rotor thermal-induced vibrations

作　　者：徐宁[1,2] 刘占生[1] 董延阳 杨帆[1] 王庆超[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001 [2]中国船舶重工集团公司第七〇三研究所,哈尔滨150078

出　　处：《振动与冲击》2015年第19期163-170,共8页Journal of Vibration and Shock

基　　金：国家高技术研究发展计划(2008AA05A302)

摘　　要：针对燃气轮机转子在启停暂态及变工况下的振动过大问题,建立了转子瞬态动力学特性理论分析模型,基于转子热变形现象将转子热变形等效为弯曲激励力,分析了转子在热变形激励下快速启动过程的瞬态响应特性、热变形与不平衡耦合激励下的转子在不同启动过程中的瞬态动力学特性,以及热变形随启动过程衰减的转子瞬态动力学特性,研究成果为燃气轮机转子热致振动特性研究提供理论依据与基础。Aiming at larger vibration problems of gas turbine rotor in transition states,the transient rotor dynamic model was established. The thermal deformation of the rotor was equivalent to the bending excitation force based on the analysis of rotor thermal deformation. The transient response characteristics of the rotor under the bending excitation force in the process of fast start-up,those under thermal deformation and unbalanced coupling excitation,and the transient response characteristics of the rotor with thermal deformation decaying in the start-up process were analyzed. The study results provided a theoretical basis for studying gas turbine rotor thermal-induced vibration characteristics.

关 键 词：燃气轮机转子 瞬态动力学 热变形 不平衡 热致振动 

分 类 号：TB533[理学—物理]