Research on the friction-induced vibration mechanism of rubber stern tube bearing

Peng, Engao; Huang, Ronghua

doi:10.2495/ciie140391

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2020

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“…where, 𝑁 is the normal load of bearing; 𝑎 is the unit inverse velocity constant; 𝜇 and 𝜇 are respectively the static and dynamic friction coefficients; 𝑟 is the radius of the shaft disc; 𝜃 is the axial angular velocity in contact with the stern bearing. Some researchers also introduced a more simplified empirical formula [19]:…”

Section: Journalmentioning

confidence: 99%

Research on the influence of the normal vibration on the friction-induced vibration of the water-lubricated stern bearing

Jin¹,

Deng²,

Liu³

et al. 2020

J. vibroeng.

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During the slow voyage of ships, the friction-induced vibration noise often occurs in the contact region of the water-lubricated stern bearing and the tail shaft. The lateral vibration can impact the normal motion of the contact surface, then change the dynamic friction force, finally affect the behaviour of the friction-induced vibration. By adding the movement of the stern shaft journal into the normal load description of the dynamic friction, the equation of friction-induced vibration considering the effect of normal vibration was established. Then the effect law of normal vibration on friction-induced vibration was discussed by numerical simulation and test. The results show that the normal vibration would make the friction-induced vibration appear quasi-periodic, chaotic trend, and narrow the speed range in which the noise of friction-induced vibration appears.

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Section: Journalmentioning

confidence: 99%