A Broadband Vibration Isolator with Periodic Structure

Abstract

The invention provides a broadband vibration isolator with a periodic structure, which belongs to the technical field of vibration isolation. The vibration isolator includes a variable-section sheet beam, a periodic structure, connectors, glands, a base and a base. The head of the variable-section sheet beam is connected to the lower end of the connector using M5 screws; the tail of the sheet beam is connected to the upper end of the base using M5 The bolts are connected; the upper end surface of the connecting piece is connected with the gland using M5 screws; the periodic structure and the connecting piece are connected by M6 bolts through the through holes on the upper end surface of the periodic structure; the rubber is filled inside the periodic structure, and the periodic structure and rubber are matched through the glue filling process. Both the upper end surface of the base and the lower end surface of the connecting piece are processed into oblique planes, which are convenient to use screws to connect with the variable-section thin-plate beams; the lower end surface of the periodic structure and the base are fixed with M5 bolts. The variable-section thin-plate beam generates negative stiffness in the vertical direction through bending, and the periodic structure provides positive stiffness. The combination of the two forms a broadband vibration isolation system to reduce the peak frequency; the rubber in the periodic structure provides damping to reduce the peak response.

Description

technical field [0001] The invention relates to the technical field of vibration isolation, in particular to a broadband vibration isolator with a periodic structure. Background technique [0002] In major engineering fields such as aerospace satellites, precision machinery, photoelectric detection, medical equipment, and laser ranging, vibration control has always been one of the key points of engineering research. With the rapid development of the economy, the vibration isolation requirements for equipment in the engineering field are getting higher and higher, especially in some high-tech fields, the vibration of the surrounding environment, such as people walking, road driving and large-scale equipment operation, installation and debugging will affect the performance of the equipment. The stability and accuracy of the test will be affected, and even irreversible damage will occur. In order to ensure the stability of the equipment, vibration isolation control is required...

AI Technical Summary

Problems solved by technology

By increasing the static stiffness of the vibration isolator and reducing its dynamic stiffness, the problem of unstable vibration isolation performance in the prior art is solved

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