Shock Response Analysis for a Propulsion Shaft System in Time Domain

Abstract:

By a transfer matrix-Newmark formulation iteration method, shock response analysis in time domain was performed for a propulsion shaft subjected to base-transferred shock excitations. In order to eliminate the numerical instability of TMT, the transfer vector is used, instead of the traditional one. Influences of gyroscopic effect and initial stress on response were investigated. Main conclusions are that gyroscopic effect has no obvious effect on shock response. Initial stress increases the total shock response, but the total response isn’t equal to the absolute sum of initial stress and shock excitations acting alone. Both ends of the shaft, that are propeller and thrust bearing locations, are weaker to bear shock excitations. Maximum amplitude of response occurs at the propeller location.

• Periodical: Applied Mechanics and Materials (Volumes 58-60)
• Pages: 2534-2539
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.58-60.2534
• Online since: June 2011
• Authors: Yan Qing Wang, Rong Yu, Rong Ling Chen
• Keywords: Propulsion Shaft, Shock, Shock Response Analysis, Structure Dynamic, TMT

References

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[5] Z. Gu, et al. Transient response analysis of large-scale rotor-bearing system with strong non-linear elements by a transfer matrix-Newmark formulation iteration method, Journal of Sound and Vibration, 2003, 259(3), 559-570. Tab. 2 Effect of initial stress on shaft natural frequencies, =0rap/min Natural frequencies(Hz) 1 2 3 4 5 6 7 8 9 10 Considering initial stress.

DOI: 10.1006/jsvi.2002.5094

[3] 6538.

[7] 4113.

[7] 4113.

[14] 379.

[17] 898.

[17] 898.

[19] 827.

[19] 827.

[22] 290.

[22] 290 No Considering initial stress.

[3] 6538.

[7] 7991.

[7] 7991.

[14] 379.

[18] 943.

[18] 943.

[20] 749.

[20] 749.

[22] 464.

[22] 464 Tab. 3 Responses at each location, =290rap/min Location Thrust bearing Intermediate bearing No. 1 Intermediate bearing No. 2 Intermediate bearing No. 3 Intermediate bearing No. 4 Stern bearing No. 1 Stern bearing No. 2 Bracket bearing Propeller Transient maximum deflection (mm).

DOI: 10.4271/as27649c

[2] 1.

[7] 0.

[9] 9.

[8] 1.

[5] 9.

[10] 0.

[12] 3.

[14] 7.

[47] 9 Transient maximum von Mises stress (MPa) 563 457 327 399 489 238 251 356 694.