| Résumé | A technique is described, and a computer program listed, for assessing the degree of balance achieved by a given distribution of unequal-weight blades around a disc. In addition, a separate portion of the routine provides a similar assessment fora number of randomly-spaced masses and holes (negative masses) disposed about an axis of rotation.
Program output includes the unbalance and the "out of balance “force vector generated at any prescribed rotational speed. At present the method is restricted to considering each axial plane separately, but is capable of handling any number of planes, each of which may contain up to 500 blades or masses.
The current form of the program also requires manual-arrangement of the blading (by re-ordering the input cords) to achieve successively better balance. However, suggestions are made whereby further programming could be added to automate the blade re-arrangement procedure and thus have the computer output the best blading distribution and the minimum unbalance conditions directly. |
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