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# (Solved): (20%) 3. A Long Shaft Is Supported By Three Identical Hydraulic Bearings And Meshes Through Gears Wi...

(20%) 3. A long shaft is supported by three identical hydraulic bearings and meshes through gears with a shorter shaft supported by two identical bearings as shown in the figure on the left. Each bearing has a configuration as shown in the bearing details" figure on the right. Fluid dynamic viscosity y = 0.005 N Upper shaft has a diameter dupper = 0.02 m, bearing diameter Dupper -0.021 m, each of the 3 bearings has a length / -0.02 m. Lower shaft has a diameter diver -0.01 m, bearing diameter Dinner -0.011 m, each of the 2 bearings has a length 1-0.02 m. Gear attached to the upper shaft has teeth NI -56: gear attached to the lower shaft has teeth N2 - 28. Calculate equivalent damping coefficient at the upper shaft for the system. (Bearing details)

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