Investigation of Dynamic Characteristics of Rolling-Ball Dampers

                                
==Abstract==

Tuned mass dampers, consisting of a mass, spring, and damper, are widely used for 
vibration suppression in structures. Despite being small and lightweight, these dampers exhibit 
excellent damping effectiveness. However, there are issues such as performance degradation 
due to the aging of the spring and damper, as well as the need for frequent maintenance.
Therefore, as an alternative vibration control device that does not rely on these components, a
rolling-ball damper is proposed. This damper consists of a container with a lid and multiple 
enclosed particles on its curved surface. By utilizing the contact between particles and the 
friction between particles and the container, the rolling-ball damper can absorb and suppress 
the vibration energy imposed on the structure to which the container is attached. In this study, 
we investigated the characteristics of the rolling-ball damper in a horizontal vibration system. 
We experimentally verified the effects of the size and number of enclosed particles on damping 
performance. Furthermore, numerical simulations were conducted by the discrete element 
method using EDEM® software and the multibody dynamics simulation method using 
MotionSolve® software. A comparison between experimental and numerical simulation results 
demonstrated the effectiveness of numerical calculations in predicting the amplitude response

== Full Paper ==
<pdf>Media:Draft_Sanchez Pinedo_470042850pap_54.pdf</pdf>