Journal of Computational & Applied Research in Mechanical Engineering (JCARME)

Document Type : Research Paper

Authors

¹ Key Laboratory of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang, Jiangxi, 330063, China

² School of Mechanical Engineering, Guangxi University, Nanning, Guangxi, 530004, China

³ School of Aircraft Engineering, Nanchang Hangkong University, Nanchang, Jiangxi 330063, China

https://doi.org/10.22061/jcarme.2023.9410.2262

Abstract

Currently, the existing study on rotor system with disk-shaft clearance primarily focus on analyzing factors such as interference force and friction coefficient, while neglecting the vibration characteristics during the rotational states. Therefore, a finite element model is established by taking rotor systems with disk-shaft clearance as the research object. The vibration characteristics of rotor systems under different clearances or rotation speeds are analyzed. Increasing clearance leads to gradual fluctuations in the speed difference of shaft to disk, accompanied by an increasing periodicity of these fluctuations. In the time domain diagram, beat vibration characteristic become evident, and its period undergoes noticeable changes. The amplitude of rotation frequency increases, while that of multiple frequency decreases gradually and tends to a constant value. The presence of clearance causes the orbit of the disk center to become an irregular circle, and the shape of 8 appears. Additionally, collision and friction of shaft to disk result in apparent serrations in the orbit. As the rotational speed increases, the speed difference initially increases but eventually reaches a stable value. The beat vibration characteristic disappears due to the small speed difference, leading to a small amplitude of the multiple frequency. The orbit of the disk center tends to become circular, and the serrated phenomenon weakens and disappears. Finally, the experiments of rotor systems with disk-shaft clearance are carried out. The results are in good agreement with the simulations, which verifies the correctness of the dynamic model. The research results can provide a theoretical basis for understanding rotor systems with disk-shaft clearance.

Graphical Abstract

Keywords

Main Subjects

Dynamic Response

References

[1] S. Cao, Q. Xiang and G. L. Xiong, "Review of Mechanical Looseness Phenomena and Failure Characteristics Study", Noise and Vibration Control, Vol. 35, No. 2, pp. 1-6+23, (2015).

[2] N. Li, F. Qiao, W. X. Lu, J. Liu, D. Wang and F. L. Chu, "Vibration characteristics of rotor system with loose disc caused by the insufficient interference force", Chin. J. Mech. Eng., Vol. 35, No. 1, pp. 70, (2022).

[3] H. Baek, N. T. Jeong, H. R. Hong, S. B. Choi, E. S. Lee, H. M. Kim, J. W. Kwon, S. Y. Song, H. S. Jang, H. Y. Lee and M. W. Suh, "Loosening mechanism of threaded fastener for complex structures", J. Mech. Sci. Technol., Vol. 33, No. 4, pp. 1689-1702, (2019).

[4] H. Liu, H. J. Ouyang, Z. Q. Feng, Z. B. Cai, J. F. Peng, Y. Q. Du and M. H. Zhu, "Self-loosening of bolted L-stub connections under a cyclic separating load", Wear, Vol. 426-427 Part A, pp. 662-675, (2019).

[5] Zhang, Study on dynamic characteristics of rotor system with foundation looseness, MA thesis, Lanzhou Jiaotong University, Lanzhou, Gansu, (2018).

[6] Z. Xu, N. F. Wang and D. X. Jiang "Bearing pedestal looseness dynamic model of dual rotor system and fault feature", Journal of Aerospace Power, Vol. 31, No. 11, pp. 2781-2794, (2016).

[7] Y. Qin, Q. K. Han and F. L. Chu, "Bolt loosening at rotating joint interface and its influence on rotor dynamics", Eng. Fail. Anal., Vol. 59, pp. 456-466, (2016).

[8] Y. Zhang, D. F. Zeng, L. T. Lu, Y. B. Zhang, J. Wang and J. M. Xu, "Finite element modelling and experimental validation of bolt loosening due to thread wear under transverse cyclic loading", Eng. Fail. Anal., Vol. 104, pp. 341-353, (2019).

[9] L. Chu and Y. Tang, "Stability and non-linear responses of a rotor-bearing system with pedestal looseness", J. Sound Vib., Vol. 241, No. 5, pp. 879-893, (2001).

[10] H. Liao, H. W. Zhang and C. H. Wu, "FEA on frictional contact problems of impeller-shaft sleeve-shaft", China Mechanical Engineering, Vol. 17, No. 10, pp. 1010-1014, (2006).

[11] E. Truman and J. D. Booker, "Analysis of a shrink-fit failure on a gear hub/shaft assembly", Eng. Fail. Anal., Vol. 14, No. 4, pp. 557-572, (2006).

[12] Y. Xiang, G. Q. He, B. Liu, Z. F. Hu and M. H. Zhu, "Overview of factors influencing fretting fatigue of wheel axle of high-speed train", Materials Review, Vol. 23, No. 1, pp. 63-66, (2009).

[13] K. Duan, X. Y. Yang, L. W. Dong and B, Wang, "Research on fracture of compressor blade dovetail from fretting wear", Gas Turbine Experiment and Research, Vol. 22, No. 3, pp. 28-32, (2009).

[14] Z. Huang, Contact numerical analysis and fretting character research on shaft-hub of compressor impeller, MA thesis, North University of China, Taiyuan, Shanxi, (2012).

[15] L. Lu, Investigations on composite fretting of the shaft-hub of compressor impeller, MA thesis, North University of China, Taiyuan, Shanxi, (2015).

[16] Liu, J. X. Liu, Z. X. Zuo and H. Y. Zhang, "Numerical study on residual stress redistribution of shot-peened aluminum 7075-T6 under fretting loading", Int. J. Mech. Sci., Vol. 160, pp. 156-164, (2019).

[17] F. Peng, B. T. Wang, X. Jin, Z. B. Xu, J. H. Liu, Z. B. Cai, Z. P. Luo and M. H. Zhu, "Effect of contact pressure on torsional fretting fatigue damage evolution of a 7075 aluminum alloy", Tribol. Int., Vol. 137, pp. 1-10, (2019).

[18] Behzad and M. Asayesh, "Vibration analysis of rotating shaft with loose disk", IJE Transactions B: Applications, Vol. 15, No. 4, 385-393, (2002).

[19] Behzad and M. Asayesh, "Numerical and experimental investigation of the vibration of rotors with loose discs", Proc. Inst. Mech. Eng., Part C: J. Mech. Eng. Sci., Vol. 224, No. 1, pp. 85-94, (2010).

[20] H. Wei and W. X. Lu, "Analysis on vibration characteristics of disk-shaft system with loose fit", Journal of Dynamics and Control, Vol. 16, No. 3, pp. 244-249, (2018).

[21] H. Wei, W. X. Lu and F. L. Chu, "Speed characteristics of disk-shaft system with rotating part looseness", J. Sound Vib., Vol. 469, pp. 115127, (2020).

[22] Liu, Study on vibration characteristics of rotors with loose disc, MA thesis, Nanchang Hangkong university, Nanchang, Jiangxi, (2018).

[23] Liu, Z. N. Li and W. X. Lu, "Effects of unsteady oil film force on rotor system with loose disk and shaft", Journal of Vibration and Shock, Vol. 38, No. 17, pp. 268-275, (2019).

[24] N. Li, J. Liu, W. X. Lu and F. L. Chu, "Research on dynamic modeling and simulation of rotors with loose disc", Journal of Mechanical Engineering, Vol. 56, No. 7, pp. 60-71, (2020).

[25] J. Zhou, S. Y. Chen, Z. N. Li, C. Z. Chen and W. X. Lu, "Characteristics of rotor system with shaft-hub micro-motion subjected to interference failure", Journal of Shenyang University of Technology, Vol. 43, No. 4, pp. 413-419, (2021).

[26] N. Li, Y. L. Li, D. Wang, Z. K. Peng and H. F. Wang, "Dynamic Characteristics of rotor system with a slant crack based on fractional damping", Chin. J. Mech. Eng., Vol. 34, No. 1, pp. 27, (2021).

[27] R. Mutra and J. Srinivas, "An optimization-based identification study of cylindrical floating ring journal bearing system in automotive turbochargers", Meccanica, Vol. 57, No. 5, pp. 1193–1211, (2022).

[28] X. Qu, G. Chen and B, Qiao, "Signal separation technology for dynamic model of rotor with unbalance-rubbing-looseness couped faults". Journal of Vibration and Shock, Vol. 30, No. 6, pp. 74-77+96, (2011).

[29] H. Liu, Study of finite element method for rotor-casing system vibration characteristic analysis, MA thesis, Shenyang Aerospace University, Shenyang, Liaoning, (2016).

[30] R. Mutra, J. Srinivas and R. Rządkowski, "An optimal parameter identification approach in foil bearing supported high-speed turbocharger rotor system", Arch. Appl. Mech., Vol. 91, No. 4, pp. 1557–1575, (2021).

[31] F. Wang, G. Chen, Z. K. Liao, Z. Zhang and F. Y. Shao, "Modeling for whole missile turbofan engine vibration with support looseness fault and characteristics of casing response", Journal of Aerospace Power, Vol. 30, No. 3, pp. 627-638, (2015).

[32] R. Mutra and J. Srinivas, "Dynamic analysis of a turbocharger rotor-bearing system in transient operating regimes", J. Inst. Eng. India Ser. C, Vol. 101, No. 5, pp. 771–783, (2020).

[33] R. Mutra and J. Srinivas, "Parametric design of turbocharger rotor system under exhaust emission loads via surrogate model", J Braz. Soc. Mech. Sci. Eng., Vol. 43, No. 3, pp. 117, (2021).

[34] Zhang, D. Y. Zhang, Y. F. Wang, Y. H. Ma and J. Hong, "Coupling vibration characteristics analysis of shared support-rotors system", Journal of Beijing University of Aeronautics and Astronautics, Vol. 45, No. 9, pp. 1902-1910, (2019).

Name *

Email Address *

Affiliation *

Comments *

Security Code *

CAPTCHA Image