Abstract
The acoustic wave propagation in a chain of spheres was predicted based on the discrete dynamic equations of spheres. Generation of the strongly nonlinear solitary wave impulses with a harmonic input has been investigated in simulations. The size of spheres, the material properties of chain structure as well as the length of chain determine the intrinsic dynamics of the granular system and frequency bands. The forced responses of a chain under harmonic excitation with a given frequency reveal that the broad bandwidth solitary wave impulses with different periods can be created in a certain length chain with no or a small precompression force. The results exhibit great potential in biomedical ultrasound and NDT applications.
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