| 摘要 |
PURPOSE: To make the horizontal natural frequency of a dynamic vibration absorber into being anisotropic so easily without complicating it by forming a reinforcing plate with an incline to the horizontal direction in order to adjust the horizontal rigidity. CONSTITUTION: A roof type reinforcing metallic plate 3 as a reinforcing plate spreading over the whole width of a body part 2 of a laminated elastic body 1 is laminated in six layers in the vertical direction via a rubber elastic member 4. Two rubber blocks 7 and 8 to be stuck with both upper and lower support plates 5 and 6 on the one surface are set up on top and bottom of both uppermost and lowermost layers of the reinforcing metallic plate 3. Here, in order to show a grade of the metallic plate 3, an incline 9 of the metallic plate 3 takes an angleθto be formed with the horizontal direction, namely, a bottom surface 10 of the lower support plate 6, setting this value to 20 degrees. In addition, the support plates 5 and 6 are made of ordinary steel, and the width is set to be wider than that of the body part 2 of the laminated elastic body 1 and a bolt hole 11, where a lock bolt is inserted through, is installed in the end. |
