26-08-2017, 09:43 AM
Tuned dynamic dampers and tuned dough dampers are reactive devices used in structural and acoustic systems to absorb oscillation at a given force frequency or a wet oscillation at a particular resonant frequency. The constitution of the tuned damper and the tuned damper are largely the same, ie they are formed by an inertial element (mass), an elastic element (spring) and an energy dissipation element (shock absorber, mainly type viscosity ). What distinguishes one from the other is the degree of dissipation of energy in its dissipative element. The tuned dampers have negligible but tuned dampers have a considerable amount of damping (energy dissipation).
In vibration analysis, a dynamic vibration damper, or a vibration neutralizer, is a tuned spring-mass system that reduces or eliminates the vibration of an excited harmonic system. Rotating machines such as motors, motors and pumps often incite vibration due to rotational imbalances. A dynamic damper can be attached to the rotating machine and tuned to oscillate in such a way as to counteract exactly the force of the rotary unbalance. This reduces the chance of a resonance condition occurring, which can cause rapid catastrophic failure. If properly applied, a dynamic shock absorber will neutralize undesirable vibration, which would otherwise reduce service life or cause mechanical damage.
Dynamic dampers differ from tuned dampers in that dynamic dampers do not require any damping to function satisfactorily. However, a damping can be introduced to increase the frequency range for which the dynamic absorber is effective. Although dynamic dampers help to eliminate vibrations at the natural frequency of the system, they generate two new natural frequencies. Therefore, the mass of the absorber must be suitably chosen to have an effective dynamic damping system.
In vibration analysis, a dynamic vibration damper, or a vibration neutralizer, is a tuned spring-mass system that reduces or eliminates the vibration of an excited harmonic system. Rotating machines such as motors, motors and pumps often incite vibration due to rotational imbalances. A dynamic damper can be attached to the rotating machine and tuned to oscillate in such a way as to counteract exactly the force of the rotary unbalance. This reduces the chance of a resonance condition occurring, which can cause rapid catastrophic failure. If properly applied, a dynamic shock absorber will neutralize undesirable vibration, which would otherwise reduce service life or cause mechanical damage.
Dynamic dampers differ from tuned dampers in that dynamic dampers do not require any damping to function satisfactorily. However, a damping can be introduced to increase the frequency range for which the dynamic absorber is effective. Although dynamic dampers help to eliminate vibrations at the natural frequency of the system, they generate two new natural frequencies. Therefore, the mass of the absorber must be suitably chosen to have an effective dynamic damping system.