FEM Modeling Technology and Vibration Analysis of Flexible Rotor System

摘要：

　　The low-pressure spool in a high-bypass ratio turbofan engine has its unique characteristics.The slightness rotor and the large lumped mass in blade and disk are the structural characteristics while the dynamic coupling between bladed-disk and shaft is the mechanical characteristic.This paper studies on the modeling technology of a flexible rotor system based on the finite element method (FEM).The equivalent-disk method, an equivalent principle of finite element modeling, is put forward.The blades are equivalent to a disk which can not only retain the structural and mechanical characteristics but also control the scale of the model and convert the periodic geometry into axisymmetric geometry.The results show that the equivalent-disk method is helpful to improve the modeling techniques of rotor system and can be used in engineering.

关键词： Modeling Technology Rotordynamic Flexible Rotor

作者: Zhi Chao Liang Jie Hong Yan Hong Ma Tian Yuan He

作者单位: School of Jet Propulsion,Beihang University,Beijing,100191,China

会议类型: 国际会议

会议名称: the 2012 International Conference on Vibration, Structural Engineering and Measurement (2012年振动、结构工程与测量国际会议(ICVSEM2012))

会议地点: 上海

会议语种:英文

页码: 257-261

在线出版日期: 2012-10-19（万方平台首次上网日期，不代表论文的发表时间）