1972-02-01

Determining Critical Whirl Speeds for Outboard Motor Crankshaft Flywheel Assembly 720731

The current study proceeds from an experimental observation of crankshaft flywheel whirl to the satisfactory development of a method of analysis. It aims to establish the most simplistic approach compatible with system behavior. The results of this study point to a mathematical model based upon a rigid disk whirling about the end of a flexible shaft. The proposed model represents a sensible compromise between accuracy and simplicity, which leads to a simple expression for the critical whirl speeds in terms of the most significant system parameters.

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