Regular Orbits Exhibiting Multiple Impact Characteristics from a Cracked Beam Under Sinusoidal Excitation

Previous work by the authors and co-workers has predicted the occurrence of multiple impacts when a cracked beam was subject to sinusoidal excitation. A limited amount of experimental evidence, indicating complex periodic trajectories, was observed in an earlier study but limitations in the instrumentation made positive identification of impulsive events impossible. The paper presents observations of regular orbits which clearly contain multiple impulsive events.