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| bstract: In recent years, a considerable amount of research effort has gone into the investigation of
free and/or forced vibration characteristics of a spinning shaft with attached discs, but there has been
less research on the transverse vibration of a high-speed diesel engine crankshaft system under firing
conditions. This paper presents a new exact general approach based on a distributed continuous model
to study the free and forced bending vibrations of an engine crankshaft. Distributed continuous
models of the crankshafts for a four-cylinder (with a capacity of 3.8 l ) and an in-line six-cylinder
(with a capacity of 5.8 l ) direct-injection diesel engine were constructed. The general frequency equation
and mode shapes for the bending vibration of the total crankshaft under operating conditions were
obtained using the coefficients transfer matrix method. Modelling and analysis procedures were applied
to the crankshaft systems of two diesel engines, and the inherent freque |
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| Keywords:diesel engine, crankshaft, bending vibration, distributed continuous model |
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