Study on Isolation Device for Decrease of Displacement by Using Control of Friction

Abstract

This paper deals with development of new isolation device by using friction force. This isolation device carries out reduction of horizontal relative displacement by using friction force. The isolation device uses a slope plate. The Friction force acts on the slope plate. The restoring-force is given to the isolation device from the compression spring attached to the base. In the equation of motion of analytical model, the friction force changes in proportion to displacement. The restoring-force is also proportional to displacement. The restoring-force always works in the direction of a center. Therefore, the friction force and restoring-force are proportional to displacement. Simulation analysis is calculated on various conditions using the analysis model. Condition reducing both response acceleration and displacement effectively is examined. The reductions of the response acceleration and the relative displacement are shown by the simulation results. The isolation device for the experiment is designed using the analysis model.