Abstract
Particle dampers are devices used to control the vibration of mechanical systems. In this research, prototypes of rotary elastomer particle dampers are experimentally tested considering gap and no gap between shaft and cylinder. There is a gap between the rotor and cylinder in the gap model; particles can move from one chamber to another. There is no space for the particles to move from one chamber to another in the no-gap model. Elastomer particles are soft, and they have different behavior from hard (metallic) particles. Experiments on rotary elastomer particle dampers considering the gap between rotor and cylinder helped investigate the effects of the change in packing fraction, rotational speed, size of elastomers, and the gap between the rotor and the damper body. A numerical simulation approach based on the discrete element analysis method is used to perform a quantitative and qualitative analysis of the rotary elastomer particle damper. The simulation results are in great agreement with the experiment results. It is observed that packing fraction, rotational speed, size of elastomer particles, and the gap between rotor and cylinder play a vital role in producing higher damper torque.
Highlights
Vibrations are frequent oscillations of mechanical systems
We have performed extensive experiments to analyze the damper torque performance of rotary elastomer particle dampers. e qualitative and quantitative analysis of the rotary damper is performed via numerical simulation. e purpose of the simulation is to allow us to analyze the behavior of the elastomer particles inside the damper
We first present a simulation experiment result to study the behavior of particles, followed by a detailed analysis of the damper torque properties using rotary elastomer particle damper with gap and no-gap model prototypes
Summary
Vibrations are frequent oscillations of mechanical systems. Most of the case vibrations are unwanted excitations to the mechanical systems. Vibrations can be extremely dangerous for mechanical systems which can severely affect health as well as human lives. E passive vibration damping technique is one of the most suitable solutions in industrial applications of vibration control. Conventional passive damping technique consists of frictional devices, impact dampers, oil dampers, and tuned mass dampers. A particle damper is a vibration control device in which different metals, ceramic, tungsten, rubbers, sand, or other types of particles are used. Particle damper controls the vibration of any mechanical system by dissipating the kinetic energy; kinetic energy can be dissipated in two ways in a particle damper, one by friction and second is collisions between particleparticle and particle-wall of the damper
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