连接结构刚度非对称对高速转子动力特性影响  

Influence of unsymmetrical stiffness of joints on high-speed rotor dynamic characteristics

作　　者：王东 韩卓荦[2] 杨哲夫 王永锋 马艳红 WANG Dong;HAN Zhuoluo;YANG Zhefu;WANG Yongfeng;MA Yanhong(Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China;School of Energy and Power Engineering,Beihang University,Beijing 102206,China;Research Institute of Aero-Engine,Beihang University,Beijing 102206,China)

机构地区：[1]中国航发沈阳发动机研究所,沈阳110015 [2]北京航空航天大学能源与动力工程学院,北京102206 [3]北京航空航天大学航空发动机研究院,北京102206

出　　处：《航空动力学报》2024年第12期133-143,共11页Journal of Aerospace Power

基　　金：国家重大科技专项(2017-Ⅳ-0011-0048,2017-Ⅶ-0010-0104);国家自然科学基金(52075018)。

摘　　要：针对界面连接转子系统的弯曲刚度非对称性产生机理及其对动力响应影响问题,基于欧拉-伯努利梁理论,提出了考虑转子非协调涡动影响的界面连接刚度非对称性的有限元素建模方法,并在带有中介轴承的双转子系统上开展了仿真与试验验证。结果表明:由于转子间交互激励作用,双转子系统产生非协调涡动,在相应的转子动力响应频谱中将出现明显的转速组合频率,而当组合频率靠近双转子共振模态频率时,转子非协调涡动程度加剧、组合频率幅值加大,可能对转子及支承结构造成严重损伤。A breathing model considering the effect of rotor whirl motion was established.Based on the Euler beam theory,a lumped parameter modeling method of the dual-rotor system taking asymmetric joint stiffness into account was proposed,and experiments on an aero-engine dual-rotor system supported by intermediate bearing was conducted.The results showed that the combination of two excitation frequencies appeared in the rotor response spectrum.The amplitude of the combination frequency could increase when the rotational speed was in the vicinity of the coupled vibration modes frequency,which may damage the supporting structures.

关 键 词：螺栓连接 界面损伤 刚度非对称 双转子系统 组合共振 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]