Author(s)

A. Fuerst, H. Sprysl

Abstract

In machinery shafts are important machine elements for power transmission. In structure and dynamic analysis for shafts or beams the stress concentration and critical speed have to be observed. To determinate the torsional vibration the polar moment of inertia of a cross section has to be known. This paper presents a method that is easy to use and very precise to get the polar moment of inertia and shear stress concentration of shafts with arbitrary cross sections. It presents the theoretical derivation of the thermal analogy and its application with Boundary Element Method (BEM). A comparison to analytical solutions shows the excellent accuracy of the method. Finally, the method is applied to a spider shaft of a big generator. Simulated and measured dat

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