Abstract
This paper describes the new elasto-plastic damper, named the LED-rotary-type damper, This damper contains lead as an energy-absorbing material. The damping force is generated from the plastic shear deformation at the top of the projections arranged on the swing shaft. Then, experimental devices with the rated damping force of 4.9, 9.8, 14.7, and 98 kN were manufactured on trial and examined to elucidate the fundamental characteristics. In these results, this damper has favorable characteristics such as dependance on low velocity, relaxation and durability of the damping force. From this point of view, this damper is more suitable for use in vibration control in comparison with other elasto-plastic dampers.
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