Transient Dynamics Simulation Analysis And Experimental Research On Water Lubrication Rubber Alloy Bearing

This research subject originates from the State Natural Sciences Foundation General Projects “Research of the vibration and noise mechanism and reliability on the large-size water lubricated rubber alloy bearing”(51775521).The properties of vibration, noise reduction and energy saving as well as being able to operate safely and reliably of the large-size water lubricated rubber alloy bearing directly influence the efficiency, safety and durability of ships. This article focuses on the water lubricated rubber alloy bearing used in ship, using the Explicit module of ABAQUS to make transient dynamic analysis of bearing system under different working conditions and geometric structures, subsequently researching on the vibration and noise of friction bearing systems.Firstly, based on the real size of the 40 mm * 60 mm * 80 mm water lubricated rubber alloy bearing, Explicit module of ABAQUS is used to build the explicit dynamics simulation analysis model of bearing system, after which the rubber alloy Mooney-Rivlin material parameters needed in the finite element analysis was obtained through the curing test and tensile test of rubber alloy material. Secondly, based on the actual working conditions of the bearings, this article studies the influences on the vibration and noise of bearing system in the condition of low speed and heavy load which are brought from various friction coefficients, loads, speeds, radiuses and the numbers of water tanks. The results show that the friction coefficient and load on the bearing system have larger effects on the vibration and noise. The vibration of the bearing system increases with the increase of friction coefficient and is more prone to screaming friction noises, with the increasing of friction coefficient and load, the vibration of the bearing system increases and it`s also more prone to screaming friction noise, whereas the rotational speed has less effects on the vibration peak frequency. Bearing structures also have great influence on the vibration of bearing system. With the increasing of radius of the sink, vibration of the bearing system reduces, so does the peak frequency, which indicates the system tends to be stable. The situation goes the same when there are more sinks while other variations hold still. In the last section, friction vibration of the water lubricated rubber alloy bearing is tested and the lubricating state of the water lubricated rubber alloy bearing in different conditions discussed, after which the threshold speed of the bearing lubrication system from mixed lubrication to border lubrication. By analyzing the friction vibration and noise characteristics of water lubricated rubber alloy bearing in different speeds, we come to the conclusion that the test results and the simulation results fit each other and the research on vibration and noises of water lubricated bearings using the transient dynamic method has certain rationalities and the analysis results have certain referable values.