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Measurements and FEM Calculations of Crankshaft Stresses on a Small Utility SI Engine Under Firing Conditions
Technical Paper
978507
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English
Abstract
To observe the effect of engine applications on small engine design, bending and torsional stresses of a crankshaft were measured dynamically under various load conditions. A dynamometer and a generator were selected as the load sources, because these two devices can provide different load patterns respectively. As the results, the peak bending stresses at the crankshaft pin fillets of a dynamometer set engine were about 40∼60% larger than those of a generator set engine. Conversely, the peak torsional stress at a crankshaft journal of the dynamometer set engine was about 25% smaller than that of the generator set engine. To investigate the reasons of these differences. additional measurements and FEM calculations were carried out. Finally we found that the stiffness of the crankshaft support had a great influence on the value of the peak bending stress and the torsional stress was affected by the installation angle between the engine TDC and the rotor of the generator.
Authors
Citation
Isomura, S., Havashida, M., Ogura, K., Teramoto, T. et al., "Measurements and FEM Calculations of Crankshaft Stresses on a Small Utility SI Engine Under Firing Conditions," SAE Technical Paper 978507, 1997.Also In
References
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- Shimoyamada K. , Wakabayashi K. and Kodama T. A Study on the Characteristics of Vibrational Stresses at the Fillets of the Crankshaft of a High Speed Diesel Engine Proceedings of the Kokushikan University, the faculity of engineering, NO.21 1988
- Park Youn-Sik. , Park Joon-Youn and Lee Chong-Won Dynamic Torsional and Bending Stress Measurement from Operating Crankshaft SAE paper 1986