机匣-双转子高维系统建模与实验验证  

Modeling and experiment verification of a casing-dual-rotor high-dimensional system

作　　者：孙传宗[1] 杨瑞 陈予恕[1] 侯磊[1,2] SUN Chuanzong;YANG Rui;CHEN Yushu;HOU Lei(School of Astronautics,Harbin Institute of Technology,Harbin 150001,China;School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001 [2]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《振动与冲击》2018年第18期152-157,共6页Journal of Vibration and Shock

基　　金：国家重点基础研究发展计划(2015CB057400);国家自然科学基金(11602070);黑龙江省博士后科学基金(2016M590277)

摘　　要：以机匣-双转子实验台为研究对象,基于ANSYS建立了可表征复杂结构的高精度实体有限元模型,应用Craig-Bampton模态综合方法实现了子模型维度缩减与整机动力学模型的组装。通过对比临界转速和振型验证了缩减模型的有效性,借助三维频谱图和轴心轨迹,分析了系统稳态响应特征,进行了实验验证。结果表明,发展的机匣-双转子系统建模及模型缩减方法精确、高效,为实际航空发动机机匣-双转子系统的动力学研究提供了参考。A high-accuracy solid finite element model,which is beneficial for expressing complicated geometrical features,was established by using ANSYS software for analysing a certain casing-dual-rotor test rig.The Craig-Bampton mode synthesis method was applied to the model order reducing processes of the casing and rotors,and the whole assembly model was obtained accordingly.The validity of the reduced model was verified under critical speeds and modes.By means of 3D spectrograms and whirl orbits,the steady-state responses were investigated.Finally,the numerical results were compared with the experimental results.The results indicate the modeling and reduction of the casing-dual-rotor test rig are accurate and effective.The work provides a reference to the dynamic study of actual dual-rotor aero-engines.

关 键 词：有限元 机匣-双转子系统 Craig-Bampton方法 模态实验 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3