STUDY ON REDUCING TORSIONAL VIBRATION USING MULTI DYNAMIC VIBRATION ABSORBER ATTACHED SHAFT OF MACHINE
Abstract
This paper presented a method to reduce the torsional vibration of a shaft system with dynamic vibration absorber (DVA). A theoretical method was introduced to determine optimal parameters of the DVA, which included spring stiffness, viscous coefficient of damper, mass moment of inertia of the absorber, number, and radial position of springs and dampers. First, system equations of motion of the shaft and the DVA were elaborated using Finite Element method (FEM) and solved by Runge-Kutta algorithm to find the torsional vibration response. Then, the Taguchi method was applied for the multivariable optimization problem. By using the Taguchi method, the DVA optimal parameters were identified with objective functions of torsional vibration duration and amplitude. Analysis of variance (ANOVA) was then carried out to evaluate the contribution percentage of each parameter on the shaft vibration response. The obtained results showed that the radial position of spring was the most influential factor on vibration of the shaft. DVA with optimized parameters remarkably reduced the torsional vibration in the system.
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