| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic vibration absorber with relatively simple setting of parameters, and in which a large vibration restricting effect to a subject structure. SOLUTION: The subject structure (of a mass M) is supported through a spring (of a spring constant K) and a damper (of a damping coefficient C) to the ground vibratablein a vertical direction (with a displacement x). A first additive mass body (of a mass m1) is supported through a spring (of a spring constant k1) and a damper (of a damping coefficient c1) to the subject structure in a vibratable state ain a vertical direction (with a displacement y1). A second additive mass body (of a mass m2) is supported through a spring (of a spring constant k2) and a damper (of a damping coefficient c2) to the first additive mass body in a vibratable state in a vertical direction (with a displacement y2). Where natural frequencies of the subject structure, the first additive mass body, and the second additive mass, in the vertical direction, as sole systems, are respectively referred to as f<SB>M</SB>, f<SB>m1</SB>, f<SB>m2</SB>, then they are set to satisfy f<SB>m1</SB>>f<SB>M</SB>and f<SB>m2</SB><f<SB>M</SB>. COPYRIGHT: (C)2004,JPO&NCIPI
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