The modelling of vibratory bowl feed systems can be considered in two parts, namely the simulation of (a) the bowl feeder structure vibrations and (b) the behaviour of the components under feed conditions. This paper deals with the former problem using a lumped parameter approach, whereby a rigid bowl and rigid base are separated by three banks of flexible leaf springs. Natural frequencies and mode shapes computed from the model are compared with those obtained by experimental modal analysis of a parts feeder. The model can be easily implemented on a digital computer using standard NAG routines for matrix manipulation and computation of eigenvalues and eigenvectors.
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