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Estimation of the Engine Exciting Force and the Rigid Body Vibration Mode of the Powerplant
Technical Paper
911295
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English
Abstract
The authors developed a new method to calculate engine exciting forces by solving equations of motion using measured angular velocity fluctuation at the flywheel of the engine.
Vibration response of a powerplant to the calculated engine exciting forces can be obtained by rigid body frequency response analysis with NASTRAN program using the measured value of the powerplant moment of inertia and the mount rubber characteristics.
Calculated acceleration levels of a powerplant by this method were in close agreement with the measured ones.
This method can be applied to estimate a powerplant vibration mode and levels when such parameters as engine mount locations are changed. As examples, the effect of reciprocating mass and cylinder-to-cylinder variation of fuel delivery were quantitatively discussed.
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Authors
- Manabu Furubayashi - Isuzu Motors Ltd., Japan * Isuzu Advanced Engineering Center Ltd. Japan
- Naoyuki Soma - Isuzu Motors Ltd., Japan * Isuzu Advanced Engineering Center Ltd. Japan
- Teruo Nakada - Isuzu Motors Ltd., Japan * Isuzu Advanced Engineering Center Ltd. Japan
- Mitsuo Iwahara - Isuzu Motors Ltd., Japan * Isuzu Advanced Engineering Center Ltd. Japan
Topic
Citation
Furubayashi, M., Soma, N., Nakada, T., and Iwahara, M., "Estimation of the Engine Exciting Force and the Rigid Body Vibration Mode of the Powerplant," SAE Technical Paper 911295, 1991.Also In
References
- Takada, H. Idle Body Shake Analysis Using VSAP Jidoshagijutsu 38 12 1984
- Yonezawa, T. et al. A Study of Engine Exciting Force of Reciprocating Internal Combustion Engines JSAE 861041 1986
- Matsuda, A. et al. Vibration Analysis of a Diesel Engine at Cranking and Idling Modes and Its Mounting System SAE 870964 1987
- Yonezawa, T. et al. A Study of Exciting Force of Reciprocating Internal Combustion Engines JSAE 861041 1986
- Nakada, T. et al. Angular Velocity Fluctuation Investigation on 4 cylinder Diesel Engine JSAE 782B51 1978