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Modeling and experiment verification of a casing-dual-rotor high-dimensional system |
SUN Chuanzong 1, YANG Rui 1, CHEN Yushu 1, HOU Lei1, 2 |
1.School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;
2.School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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Abstract 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.
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Received: 28 April 2017
Published: 15 September 2018
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