Abstract: To improve turbogenerator (TG) rotor design,Torsional vibration analysis is necessary. Torsional vibration of turbogenerator shaft occurs due to the electrical unbalances and disturbances in the generator (short circuits, line switching, faulty synchronizing etc). In the present paper 3-Dimensional (3D) solid finite element (FE) is used in FE software ANSYS, to evaluate the natural frequencies and dynamic response due to transient torque excitations. The 3D solid model eliminates the assumption inherent in the 1-Dimensioanl (1D) model, and therefore provides more realistic results. The simulation of transient torque disturbances on the rotor system caused by different short circuit faults has been performed on 3D model and the response is obtained. The computational time required for the analysis by 3D solid model is relatively more. However the 3D solid FE model provides information about all modes including the shaft and disc coupling effect. The response calculated through analytica

• Publication Date: 18-Mar-2016
• DOI: 10.15224/978-1-63248-093-4-22
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Abstract: This paper assesses the reliability of applying a popular continuum method “Equivalent Column Theory” into investigating the static and dynamic performance of various tall reinforced concrete building systems. Analytical formulae of this method were used to explore many issues that relate to the local and global behaviours of tall buildings such as horizontal deflections and fundamental frequencies in x and y directions and about z-axis. Therefore, to confirm the accuracy of this method, the same models were simulated by using the commercial finite element software SAP2000 which is considered as an exact and reliable method for comparison.

• Publication Date: 18-Mar-2016
• DOI: 10.15224/978-1-63248-093-4-31
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• Downloads: 0