STRENGTH ANALYSIS AND VALIDATION OF AN OVERHUNG SHAFT USING ANALYTICAL AND FINITE ELEMENT METHODS
Published in GÉP 2026/1
https://doi.org/10.70750/GEP.2026.1.9
Polgár Máté
PhD hallgató, Soproni Egyetem, Cziráki József Faanyagtudomány és Technológiák Doktori Iskola
Dr. Németh Gábor
egyetemi docens, Soproni Egyetem, Faipari Mérnöki és Kreatívipari Kar, Alkalmazott Tudományi Intézet
Prof. Dr. Csóka Levente
DSc., ELTE Informatikai Kar, Savaria Műszaki Intézet
ABSTRACT
This paper presents the strength analysis of an overhung shaft using analytical and finite element methods under combined bending and torsional loading conditions. The loading conditions were determined based on CFD simulations and operating data obtained from the electric motor.
Analytical calculations were used to determine the nominal stresses, while the finite element model enabled the investigation of local stress concentrations caused by geometric discontinuities. The results showed that the shaft behavior is primarily dominated by bending, whereas torsional loading acts as a secondary effect.
The validation of the numerical model was performed using measured operating torque values. At lower rotational speeds (1470 1/min), the CFD model underestimated the actual shaft loading due to the absence of mechanical losses, resulting in a relative deviation of approximately 58%. In contrast, at higher rotational speeds (2200 1/min), the relative deviation remained below 5.8%, showing good agreement between the measured and simulated reduced torque values.
The results indicate that the shaft design can be considered safe under the investigated operating conditions, and the presented methodology is suitable for the analysis and validation of similar drive systems.
