Abstract
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.
Highlights
As an essential part of the shafting of the underwater vehicle, the water-lubricated stern bearing plays a significant role in the rapidity, security, concealment and survival ability of navigation
As the underwater vehicle has some special requirements for the covert and viability, some situation, such as the trilling of the stern bearing when the propeller speed is less than 0.3 m/s, and howling when less than 0.5 m/s [2], should be avoided as far as possible
Peng [6] has studied the frictional vibration produced by the water-lubricated rubber stern bearing at low speed, and the results show that the rubber bearing had small friction coefficient, wear resistance, buffering, suppression, not sensitive to install and impact, but in the case of considerable pressure the wear of rubber body was severe, and under the specific speed the friction vibration was apparent, and JOURNAL OF VIBROENGINEERING
Summary
As an essential part of the shafting of the underwater vehicle, the water-lubricated stern bearing plays a significant role in the rapidity, security, concealment and survival ability of navigation. As the underwater vehicle has some special requirements for the covert and viability, some situation, such as the trilling of the stern bearing when the propeller speed is less than 0.3 m/s, and howling when less than 0.5 m/s [2], should be avoided as far as possible. Peng [6] has studied the frictional vibration produced by the water-lubricated rubber stern bearing at low speed, and the results show that the rubber bearing had small friction coefficient, wear resistance, buffering, suppression, not sensitive to install and impact, but in the case of considerable pressure the wear of rubber body was severe, and under the specific speed the friction vibration was apparent, and JOURNAL OF VIBROENGINEERING.
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