| 摘要 |
PURPOSE:To reduce the dynamic spring constant by supporting the vibration body and the supporting body through a rubber mount, and also supporting the mounts having weights being supported by coil springs at the both sides, in parallel to the rubber mount. CONSTITUTION:The vibration system has two degree of freedom, with two resonance frequencies f1 and f2. In the anti-resonance range between those two resonance frequencies (shadowed portion in Fig. 6A), forced F2 transmitted from engine 8 side to the body 9 side can be reduced, because of the reduction of dynamic spring constant. By selecting the mass m2 of the two weights 50 and the spring constants k2 of the three conical coil springs 15, 16 and 25, said anti- resonance frequency range can be adjusted to coincide with medium speed latent sound range F and high speed latent sound range G. Therefore, the engine vibration force input in this range can be reduced. |
