Nonlinear dynamic analysis of an optimal particle damper

Details Nonlinear dynamic analysis of an optimal particle damper Nonlinear dynamic analysis of an optimal particle damper

2011-10-12

arxiv.org/abs/1110.2800v1

Physics

Condensed Matter

Soft Condensed Matter

18 pages, 8 figures. arXiv admin note: text overlap with arXiv:1105.0304

Scientific paper

We study the dynamical behavior of a single degree of freedom mechanical system with a particle damper. The particle (granular) damping was optimized for the primary system operating condition by using an appropriate gap size for a prismatic enclosure. The particles absorb the kinetic energy of the vibrating structure and convert it into heat through the inelastic collisions and friction. This results in a highly nonlinear mechanical system. Considering linear signal analysis, state space reconstruction, Poincar\'e sections and the determination of maximal Lyapunov exponents, the motion of the granular system inside the enclosure is characterized for a wide frequency range. With the excitation frequency as control parameter, either regular and chaotic motion of the granular bed are found and their influence on the damping is analyzed.

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