Abstract
A revised blade-casing rubbing model is developed and verified by experiment, and then a finite element model of rotor-disk-blade system with blade tip rubbing between the blade and casing is established in ANSYS. Complicated vibration responses are studied by analyzing spectrum cascade, displacement waveforms, bending stress waveforms, rotor orbits and normal rubbing forces under different rotating speeds. The results show that with the increase of the rotating speed, period-two motion caused by blade-casing rubbing may appear at higher rotating speeds due to larger normal rubbing forces. Amplitude enlargement phenomena may occur when the multiple frequency of rotating frequency is close to the bending natural frequency of the blade. In addition, impact resonance phenomenon can also be observed due to the effect of blade-casing gap.
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Acknowledgments
This project is supported by Program for New Century Excellent Talents in University (Grant No. NCET-11-0078), the Fundamental Research Funds for the Central Universities (Grant Nos. N130403006 and N140301001) and the Joint Funds of the National Natural Science Foundation and the Civil Aviation Administration of China (Grant No. U1433109) for providing financial support for this work.
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Ma, H., Wu, Z., Tai, X., Li, C., Wen, B. (2015). Nonlinear Behavior Analysis Caused by Blade Tip Rubbing in a Rotor-Disk-Blade System. In: Pennacchi, P. (eds) Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Mechanisms and Machine Science, vol 21. Springer, Cham. https://doi.org/10.1007/978-3-319-06590-8_15
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DOI: https://doi.org/10.1007/978-3-319-06590-8_15
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