| 摘要 |
PROBLEM TO BE SOLVED: To provide an effective and appropriate mechanism that can obtain an excellent vibration reducing effect without requiring large additional mass such as a conventional general TMD (tuned mass damper). SOLUTION: A rotation inertial mass damper 5 is installed at a length-direction intermediate part of a beam 1, and the bending deformation of the beam is transmitted to the rotation inertial mass damper by diagonal members 6 stretched at the side part of the beam. The natural frequency of an additional vibration system composed of the rotation inertial mass damper, the diagonal members and an additional spring 7 is conformed to the natural frequency of the beam. Connection points P of both ends of the diagonal members to the ends of the beam are set to positions shifted to the beam center side rather than the beam ends to secure predetermined clearances L between the connection points and the beam ends. All of the additional vibration system are installed to be settled within the beam depth range of the beam. COPYRIGHT: (C)2011,JPO&INPIT
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