鋼-レジンコンクリート複合構造の振動減衰能について : 曲げ振動の場合

抄録

Resin concrete has been used in machine tool structures in order to improve the dynamic rigidity. However, because of the lack of strength, the use of resin concrete seems to be confined mainly to beds in machine tools. In order to be able to use resin concrrete in machine elements such as columns in machine tools, it is necessary to combine resin concrete with a conventional material such as steel. In this paper, the damping characteristics of a composite structure beam, which is a steel pipe filled with resin concrete, were investigated both theoretically and experimentally. The effects of the each wall thickness of steel and resin concrete on the damping capacity were clarified. Furthermore, a design criterion has been suggested where the weigth of the composite structure beam is reduced to its minimum under the condition of constant flexural rigidity. It was shown that the damping capacity of the composite structure beam was markedly improved at almost same weight as the steel structure.