Abstract
In this paper, we first describe the dynamic characteristics of damper rubber parts that are necessary for the modeling of torsional vibration. Secondly, we describe an experiment in which two crankshaft pulleys with a torsional rubber damper are fitted to a 6-cylinder, high-speed diesel engine. The torsional waveforms of the damper inertia ring and the pulley are measured by means of phase-shift torsiograph equipment. The measured waveforms are harmonically analyzed and the dynamic characteristics of the stiffness and the damping are investigated from an experimental viewpoint. As a result of comparisons with experimental data, certain dynamic characteristics of pulleys with a torsional rubber damper have been clarified.
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