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Modeling and Analyzing of Vibration in Working Crankshaft with Cracks

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Abstract:

In this paper, a simplified finite element model of the cracked crankshaft is proposed, and a new method for simulating the nonlinear vibration of operating crankshaft with several cracks is presented. For crankshaft, cracks occur frequently in the parts of crankpin-web fillet region and the edge of oil aperture because of fatigue or damage. According to the characteristic of those cracks, the cracked parts are modeled by the corresponding cracked spatial finite elements respectively, and two cracked elements are discussed in this study. The other, un-cracked, crankshaft parts are modeled by spatial Timoshenko beam elements. Flywheel and front pulley are simplified as lumped mass elements, and main bearings are simulated by equivalent linear springs and dashpots. In order to find the dynamic response of crankshaft-bearing system, a right-handed rotating coordinate system attached to crankshaft is applied. Based on the proposed finite element model, the breathing behavior of cracks in operating crankshaft is studied, and the nonlinear motion equation with variational stiffness is formed. Finally, a four-in-line crankshaft is taken as an example, and its vibration response corresponding to different kinds of crack are calculated and analyzed. Some conclusions are drawn, and a foundation is laid for diagnosing crack fault of crankshaft.

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Periodical:

Key Engineering Materials (Volumes 293-294)

Pages:

401-408

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.293-294.401

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Online since:

September 2005

Authors:

Xuan Yang Lei, Gui Cai Zhang, Xi Geng Song, Jin Chen, Guang Ming Dong

Keywords:

Crack, Crankshaft, Finite Element, Nonlinear

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] P.N. Saavedra and L.A. Cuitino: Computers and Structures Vol. 79 (2001), p.1451.

Google Scholar

[2] H. Okamura, A. Shinno, T. Yamanaka et al.: Journal of Vibration and Acoustics Vol. 117 (1995), p.70.

Google Scholar

[3] H.H. Priebsch, J. Affenzeller and S. Gran S: Journal of Engineering for Gas Turbines and Power, Transactions of the ASME Vol. 115 (1993), p.711.

Google Scholar

[4] S.S. Rao: The Finite Element Method in Engineering (Pergamon Press. Oxford 1989).

Google Scholar

[5] A.A. Smaili and M.P. Khetawat: Mechanism & Machine Theory Vol. 29 (1994), p.995.

Google Scholar

[6] X. Lei and X. Song: China Mechanical Engineering Vol. 14 (2003), p.1466.

Google Scholar

[7] C.A. Papadopoulos and A.D. Dimarogonas: Journal of Sound and Vibration Vol. 117 (1987), p.81.

Google Scholar

[8] T.C. Tsai and Y.Z. Wang: Journal of Sound and Vibration Vol. 192 (1992), p.607.

Google Scholar

[9] A.S. Sekhar. Noise and Vibration Worldwide Vol. 30 (1999), p.23.

Google Scholar

[10] A.W. Lees: Proceedings of the International Modal Analysis Conference - IMAC, 2000, p.313.

Google Scholar

[11] D. Taylor, A.J. Ciepalowicz, P. Rogers et al: Fatigue and Fracture of Engineering Materials and Structures Vol. 20 (1997), p.13.

Google Scholar

[12] R. K. Pandey: Engineering Failure Analysis Vol. 10 (2003), p.165.

Google Scholar