Dynamic Modeling and Torsional Vibration Analysis of Crankshafts Equipped with DMF & CPVA

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Mohammadi, Sobhan | 2016

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 48788 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Sayyadi, Hassan
Abstract:
Torque variations caused by intermittent combustion and inertia effects of reciprocating components, exert significant torsional excitation on crankshaft of internal combustion engines. These excitation induces considerable torsional vibration on crankshafts. Therefore, modeling and analysis of crankshaft torsional vibration and absorber systems, especially in automobiles engine that crankshaft tolerate high amplitude excitations coupled with heavy inertia effects has high importance. In this study, ability of centrifugal pendulum vibration absorber and dual mass flywheel which used in rotating machinery for vibration reduction, will be examined. At first, cranktrain will be torsionaly modeled then dynamic equations of dual mass flywheel and pendulum absorber will be extract. Torsional response of crankshaft under excitation torques will be analyzed and ability of these systems for reducing torsional vibration of crankshaft at different operating conditions will be discussed
Keywords:
Dynamic Modeling ; Internal Combustion Engines ; Torsional Vibration ; Flywheel ; Torque Ripple ; Dual Mass Flywheel ; Pendulum Vibration Absorber

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