燃气轮机转子系统振动激励源特性研究

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。

Analysis of Vibration Characters of Excitation Sources in Gas Turbine Rotor Systems

The vibration is a key problem of gas turbine system. The vibration sources is complicated and various because of the complicated structure. The vibration transferred to the seat is concerned problem of marine gas turbine. In this paper, the classic vibration excitation sources and its features are combed and analyzed based on the research of rotor system. The excitation force on machine leg is also analyzed through computation of force transmission ratio. The effects of bearing parameters and force acting point on force transmission ratio are discussed in this paper, and the frequency characteristics of fluid force acting on rotor system is also discussed in this paper. The research in this paper has guiding significance for vibration and noise reduction of gas turbine.