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Effective mass overshoot in single degree of freedom mechanical systems with a particle damper

Medio de publicación: Journal of Sound and Vibration 330, 5812–5819
Autores:  M. Sánchez, L. A. Pugnaloni
Año de publicación: 2011

 

We study the response of a single degree of freedom mechanical system composed of a primary mass, M , a linear spring, a viscous damper and a particle damper. The particle damper consists in a prismatic enclosure of variable height that contains spherical grains (total mass mp ). Contrary to what it has been discussed in previous experimental and simulation studies, we show that, for small containers, the system does not approach the fully detuned mass limit in a monotonous way. Rather, the system increases its effective mass up and above M + mp before reaching this expected limiting value (which is associated with the immobilization of the particles due to a very restrictive container). Moreover, we show that a similar effect appears in the tall container limit where the system reaches effective masses below the expected asymptotic value M . We present a discussion on the origin of these overshoot responses and the consequences for industrial applications.