COMPARATIVE EXPERIMENTAL STUDY OF VIBRATION CONTROL EFFECTS OF PARTICLE DAMPER AND TUNED MASS DAMPER UNDER SEISMIC EXCITATIONS

摘要

The vibration control effects of a pendulum tuned mass damper and aparticle damper with the same mass ratio are separately investigated by a series of shaking table tests.The test model is a single-degree-of-freedom(SDOF)steel frame attached by such devices under different seismic excitations.It is shown that the type of seismic waves has a greater influence on the vibration control effect of the tuned mass damper than that of the particle damper; the damping effect of the particle damper is generally better than that of the tuned mass damper.The reason lies in particle damper can dissipate input energy not only by tuning frequency just like the tuned mass damper,but also by collision,impact and friction between particles and the container,and momentum exchange between the secondary damper mass and the primary structure.