A device for suppressing low frequency line spectrum vibrations

By combining diaphragm components and particle dampers, the problem of low-frequency line spectrum vibration in ships was solved, achieving efficient vibration energy dissipation and frequency range expansion, while reducing system complexity and maintenance costs.

CN117780836BActive Publication Date: 2026-07-21HARBIN ENG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN ENG UNIV
Filing Date
2024-01-08
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively suppress low-frequency line spectrum vibrations caused by ship power and transmission devices. Traditional methods are costly and compromise system reliability.

Method used

The combined structure of diaphragm assembly and particle damper is adopted. The diaphragm assembly transfers external vibration energy to the particle damper. Vibration energy is dissipated through the collision and friction of damping particles in the particle damper, thereby widening the vibration absorption frequency range and improving damping performance.

Benefits of technology

It achieves effective suppression of low-frequency line spectrum vibrations, has a simple structure and high stability, and features wide-band vibration absorption and high damping, thus reducing system complexity and maintenance costs.

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Abstract

The application relates to the technical field of vibration and noise reduction, and discloses a device for inhibiting low-frequency line-spectrum vibration, which comprises a main shell, upper and lower end covers arranged at two ends of the main shell respectively, a diaphragm assembly comprising upper and lower diaphragms, the upper and lower diaphragms being installed at the two ends of the main shell through the upper and lower end covers respectively, and a granular damper arranged in the main shell and connected with the upper and lower diaphragms at two ends respectively, the upper and lower diaphragms being used for transmitting external vibration energy into the granular damper, and the granular damper being used for dissipating vibration energy. The device has the characteristics of simple structure, high stability, wide-frequency vibration absorption and high damping, and can be used for inhibiting low-frequency line-spectrum vibration.
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