Study of Critical Speed and Natural frequency with varying Diameter and Materials of Stepped Shaft using Campbell Diagram by using FEA

The effective uses of a Shaft are limited at its maximum operational junction frequency. The study was conducted by using the Finite element method. The shafts are used with flow of with rotation such as power houses components and industrial applications. The major study was done on shaft by using different materials with different shaft diameter profile of 90-100, 60-100mm. A natural frequency was analyzed and Campbell diagram analysis is performed for validation. In our analysis, ANSYS was used and the model was developed on UNIGRAPHICS 8.0. In order to verify the present ANSYS model, the Natural frequency with their modes by using four types of materials are compared with the available experimental results present in the literature and the design of shaft with different diameters of 60-100, 90-100mm. In this study, the simulations of different profile Shafts and four types of materials were analyzed for natural frequency and the configurations of shaft design are proposed. The results show that decreasing shaft diameter and material like Gray cast iron of shaft the decrease in a critical speed number of modes simultaneously. The critical speed of the shaft with different diameter is compared by using four types of materials and is predicted that at 60-100, 90-100mm shaft profile a gray cast iron gives frequencies and less critical speed in different modes.