In order to analyze the effect of using variable bearing profiles on the journal dynamic response under impact load, a Taguchi method-based model is established. The use of such profiles is performed to reduce the effect of shaft misalignment which is an unavoidable problem in the typical journal bearing applications. A 3D misalignment model is used and three forms of bearing profile are considered in the current work. The numerical solution is performed using the finite difference method and the equations of motion are solved by the 4th-order Rung-Kuta method. Results show that using a parabolic shape for the bearing profile at the positions of maximum misalignment effect (bearing edges) gives the best outcome in reducing the pressure levels and increasing the lubricant thickness. The critical speed is also enhanced in comparison with the ideal aligned design. Furthermore, using the optimized design, the response of the system to the impact load is also improved in terms of the X and Y displacement of the journal center.

Analysis of the Dynamic Response of Variable Bearing Design Under Impact Load Using Taguchi Method

Alessandro Ruggiero
2024-01-01

Abstract

In order to analyze the effect of using variable bearing profiles on the journal dynamic response under impact load, a Taguchi method-based model is established. The use of such profiles is performed to reduce the effect of shaft misalignment which is an unavoidable problem in the typical journal bearing applications. A 3D misalignment model is used and three forms of bearing profile are considered in the current work. The numerical solution is performed using the finite difference method and the equations of motion are solved by the 4th-order Rung-Kuta method. Results show that using a parabolic shape for the bearing profile at the positions of maximum misalignment effect (bearing edges) gives the best outcome in reducing the pressure levels and increasing the lubricant thickness. The critical speed is also enhanced in comparison with the ideal aligned design. Furthermore, using the optimized design, the response of the system to the impact load is also improved in terms of the X and Y displacement of the journal center.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4868733
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