燃气轮机转子系统振动激励源特性研究
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摘要
燃气轮机的振动一直是设备的关键问题之一,燃气轮机结构复杂,导致其振动的激励源具有复杂性、多样性等特点,传递到其机脚处的振动更是船用燃气轮机所关注的研究课题之一。在对燃气轮机转子系统进行研究的基础上,对转子振动的典型激励源及其振动特性进行梳理和分析,并对传递到支撑处的激励力进行分析,采用力的传递率探究典型激励源传递到支撑处的振动特性,得到轴承参数和力的作用点对力的传递率的影响规律,并对流场激励力的特性进行分析,得到流场激励力的频率特性。研究成果对燃气轮机的减振降噪以及前期的参数设计都具有一定的指导意义。
Vibration is a key problem of gas turbine systems. The vibration sources are complicated and various because of the complex structure of gas turbines. Study of vibration transferred to the turbine's supports is also an interesting topic for marine gas turbines. In this paper, the typical vibration excitation sources and their features of rotor systems of the turbines are analyzed and summarized. The excitation force transferred to the turbine's supports is analyzed.Through the computation of force transmission rate, the characteristics of vibration transform from the typical excitation sources to the supports are detected. The effects of bearing parameters and force action points on force transmission rate are discussed. And the frequency characteristics of the fluid force acting on the rotor system are also discussed. This research has guiding significance for vibration and noise reduction of gas turbines.
Vibration is a key problem of gas turbine systems. The vibration sources are complicated and various because of the complex structure of gas turbines. Study of vibration transferred to the turbine's supports is also an interesting topic for marine gas turbines. In this paper, the typical vibration excitation sources and their features of rotor systems of the turbines are analyzed and summarized. The excitation force transferred to the turbine's supports is analyzed.Through the computation of force transmission rate, the characteristics of vibration transform from the typical excitation sources to the supports are detected. The effects of bearing parameters and force action points on force transmission rate are discussed. And the frequency characteristics of the fluid force acting on the rotor system are also discussed. This research has guiding significance for vibration and noise reduction of gas turbines.
引文
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[2]闻邦椿,顾家柳,夏松波,等.高等转子动力学——理论、技术与应用[M].北京:机械工业出版社,2000.
[3]刘泽九.滚动轴承应用手册[M].北京:机械工业出版社,2013.
[4]万长森.滚动轴承的分析方法[M].北京:机械工业出版,1987.
[5]罗继伟,罗天宇.滚动轴承分析计算与应用[M].北京:机械工业出版社,2009.
[6]孟再强.透平膨胀机叶轮流热固耦合数值模拟及分析[D].上海:上海交通大学,2013.
[7]袁启铭.轴流泵叶片流固耦合振动特性分析[D].扬州:扬州大学,2009.
[8]BELAMRI T,GALPIN P,BRAUNE A,et al.CFD analysis of a 15 stage axial compressor:part I-Methods[A].ASME Turbo Expo 2005:Power for Land,Sea,and Air.American Society of Mechanical Engineers,2005.
[9]BELAMRI T,GALPIN P,BRAUNE A,et al.CFD analysis of a 15 stage axial compressor:Part II-Results[A].ASME Turbo Expo 2005:Power for Land,Sea,and Air.American Society of Mechanical Engineers,2005.
[10]CORNELIUS C,BIESINGER T,GALPIN P,et al.Experimental and computational analysis of a multistage axial compressor including stall prediction by steady and transient CFD methods[J].Journal of Turbomachinery,2014,136(6):V06CT42A016.
[11]KANG YOUNG-SEOK,SHIN-HYOUNG KANG.Prediction of the fluid induced instability force of an axial compressor[A].ASME 2006 2nd Joint US-European Fluids Engineering Summer Meeting Collocated With the14th International Conference on Nuclear Engineering.American Society of Mechanical Engineers,2006.