Vibration isolation system for floating raft with resonance peak suppression

Abstract

The invention relates to a floating-raft vibration isolation system with suppressed resonant peaks. The floating-raft vibration isolation system comprises a unit and a raft. A first switch-type damper is arranged between the unit and the raft. A second switch-type damper is arranged between the unit and a base.

Description

technical field [0001] This patent relates to a vibration isolation device for ship power units. Background technique [0002] In the design and manufacture of modern ships, more and more attention is paid to the vibration control of ship power units, especially on military ships and submarines. At present, the most effective technology is the vibration isolation technology of floating rafts. [0003] figure 1 is the mechanical model of the floating raft vibration isolation system, figure 1 The middle power unit 11, the power unit 12, and the power unit 13 are the most important sources of vibration. To better isolate the vibration transmitted from the power unit 1 to the foundation 5, a raft 3 can be added between the unit and the foundation, and each unit All are supported on the raft body 3 by the spring 2, and the raft body 3 is supported on the foundation by the spring 4 again. If we only discuss the case of only one power unit, it can be simplified as figure 2 mod...

AI Technical Summary

Problems solved by technology

However, there are three obvious resonance peaks on the acceleration frequency response curve, especially the existence of the first two resonance peaks, which has an extremely adverse effect on the vibration isolation performance of the floating raft vibration isolation system. Within a certain range, the vibration isolation effect is greatly weakened. What's more, sometimes in a certain range of frequencies corresponding to the two resonance peaks, instead of the vibration isolation effect, the vibration will be amplified.

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