The multiunit impact damper with Coulomb friction has been studied theoretically and by simulation on the digital computer. It is found that the performance of a single damper is retained when it is replaced by a multi-unit damper with a moderate number of units having the same total mass, coefficients of Coulomb friction and restitution, and gap. However, the velocity discontinuity of the damped system is reduced significantly. In periodic motion with identical units, each unit exhibiting two equispaced impacts/cycle motion, impacts occur in clusters and are not uniformly distributed in time. The effect of the number of units and Coulomb friction on the amplitude reduction, velocity discontinuity at impact and temporal distribution of impacts is considered.
[1]
Cz. Cempel.
Receptance model of the multi-unit vibration impact neutralizer—“MUVIN”
,
1975
.
[2]
N. Popplewell,et al.
Stable periodic vibroimpacts of an oscillator
,
1983
.
[3]
W. M. Mansour,et al.
Impact dampers with coulomb friction
,
1974
.
[4]
S. F. Masri,et al.
Analytical and Experimental Studies of Multiple‐Unit Impact Dampers
,
1969
.
[5]
Sami F. Masri.
Motion and Stability of Two-Particle, Single-Container Impact Dampers
,
1967
.
[6]
N. Popplewell,et al.
Stable periodic motion of multiple-unit impacting mechanisms
,
1983
.
[7]
Cz. Cempel.
The multi-unit impact damper: Equivalent continuous force approach
,
1974
.