摘要
针对航空发动机高速柔性转子系统叶片丢失所造成的突加不平衡激励,基于结构/力学特征等效原则,建立高速柔性悬臂转子系统试验器,对突加不平衡及持续碰摩所产生的附加激励下转子系统振动响应进行试验测试,并对其时域/频域响应特征进行分析。结果表明:突加不平衡瞬时具有显著冲击效应,转子系统瞬态振动响应加剧,并激起转子横向模态振动;转静件之间的持续碰摩会产生约束作用使转子系统临界转速提高,呈现非线性振动,产生谐波振动频率成分。
A high speed flexible cantilever rotor test rig was established to investigate the vibration response of the turbofan rotor in time domain and frequency domain under the sudden-unbalance and the rub-impact caused by blade loss, based on the equivalence principle of structural/mechanical characteristics. The research showed that, sudden-unbalance led to significant impact on rotor, the aggravation of the rotor＇s transient response, and flexural resonance of rotor; the rub-impact between rotor and stator resulted in the increase of the critical speed of rotor and the nonlinear vibration with the super harmonic frequencies.
作者
洪杰
陈成
王永锋
马艳红
HONG Jie1,2 , CHEN Cheng1, WANG Yongfeng1 , MA Yanhong1,2(1. School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China; 2. Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, Chin)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2018年第1期15-23,共9页
Journal of Aerospace Power
基金
国家自然科学基金(51575022
51475021)
关键词
柔性转子
突加不平衡
碰摩
振动试验
瞬态响应
flexible rotor
sudden-unbalance
rub-impact
vibration test
transient response
