Low-frequency vibration-isolation combined sandwiched structure

Abstract

The invention discloses a low-frequency vibration-isolation combined sandwiched structure. The low-frequency vibration-isolation combined sandwiched structure comprises a lower uniform layer, a middle layer and an upper uniform layer sequentially from bottom to top, wherein the middle layer is of a limited two-dimension photonic crystal structure, the limited two-dimension photonic crystal structure comprises a base body and a plurality of scatters embedded into the base body, the scatters are respectively connected with the upper uniform layer and the lower uniform layer into a whole, and the lower uniform layer, the scatters and the upper uniform layer (3) are all made of rubber materials. The scatters, the upper layer and the lower layer are combined into an integrated body and are made of the same materials. The base body needs to be fixed. The low-frequency vibration-isolation combined sandwiched structure can block incident vibration along a plate and low-frequency vibration perpendicular to the plate through the designed structure, be applied to vibration control within the frequency range of hundreds of hertz, and serve as a low-frequency vibration-isolation facility of projects such as foundations and inner walls of buildings, ships and warships, and high-speed rails.

Description

technical field [0001] The invention belongs to the technical field of vibration control, and in particular relates to a low-frequency vibration-isolation composite sandwich structure. Background technique [0002] The repeated changes in which the physical quantity of the animal increases and decreases from time to time is vibration. Vibration exists widely in nature. Vibration has an aspect that can be used, such as vibration screening, vibration transportation, and vibration theory for the design of measurement sensors. However, vibration is harmful to most engineering structures and organisms, and it can often cause vicious damage and failure of mechanical structures. Excessive vibration will shorten the mechanical life, reduce the performance of mechanical and electronic products, and even become one of the pollution sources of modern industry. [0003] In the actual living environment, most of the vibration sources are distributed in the middle and low frequency ran...

AI Technical Summary

Problems solved by technology

However, this device has obvious disadvantages: because the lead ball density is very high, the structure is very heavy and it is difficult to apply it to the actual structure, and the lead ball is wrapped with silicone rubber and then implanted into the matrix, which makes the manufacturing process complicated and difficult to shape.

However, most existing phononic crystal structures still cannot effectively block low-frequency vibrations below 100 Hz

Moreover, the traditional phononic crystal plate-like structure is only distributed in the plane of the plate due to its periodicity, and has little effect on the vibration perpendicular to the plate, so it is difficult to put it into practical applications.

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