A Vibration Isolation Device with Periodic Structure Based on Bandgap Filtering and Waveform Conversion

Abstract

The invention discloses a periodic-structure vibration isolation device which comprises two panels, multiple vertical rods and multiple oblique rods, wherein the two panels are arranged at intervals; one panel is connected with equipment which needs vibration isolation through a vibration isolator, and the other panel is connected with a mounting base by virtue of a vibration isolator; the multiple vertical rods are arranged in an array and are vertically arranged between the two panels so as to form multiple vibration isolation regions, reinforced rib plates are arranged at connection parts between all vertical rods in each vibration isolation region and the upper and lower panels; one oblique rod is arranged between every two reinforced rib plates which are arranged in opposite angles of each vibration isolation region, and the oblique rods in the two adjacent vibration isolation regions are arranged symmetrically relative to the common vertical rod, so that a vibration isolation structure with periodic arrangement is formed, the band notched characteristic of the periodic structure is formed and effective vibration isolation and noise reduction are realized. The device is capable of not only providing sufficient static rigidity and dynamic rigidity, but also effectively isolating low-frequency narrow-band line spectrums and wide-band vibration transfer which are generated by main and auxiliary mechanical devices and restraining noise radiation caused by vibration transfer.

Description

technical field [0001] The invention belongs to the technical field of vibration isolation and vibration reduction, and in particular relates to a floating raft vibration isolation device suitable for ships. Background technique [0002] Mechanical noise is the main source of noise when ships such as ships, fishing boats, and cruise ships or aircraft sail at low speeds. Low-frequency noise has a longer propagation distance than high-frequency noise, and it is easy to become a target characteristic signal and easily perceived by fish schools; the control of mechanical noise is not only beneficial to the service life of instruments and the working environment, but also improves the work and leisure of crew and passengers environment. With the continuous improvement of comfort requirements on board, mechanical noise control, as a key technology to improve the cabin environment, has been paid more and more attention by major shipbuilding enterprises. [0003] Mechanical noise ...

AI Technical Summary

Problems solved by technology

The current vibration isolation devices for floating rafts are mainly simple flat plate structures. These devices do not make full use of the attenuation mechanism between the various structures of the floating raft, and the distribution of mass and stiffness is also unreasonable, which cannot form broadband vibration attenuation.

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