Vibration reduction method and system for low frequency elastic waves, and vibration reduction device

Abstract

The invention provides a vibration reduction method and system for low frequency elastic waves, and a vibration reduction device. According to the technical scheme of the invention, the vibration reduction device is manufactured according to the characteristics of the elastic waves and the vibration reduction requirements, and the shape, size and material parameters of the vibration reduction device are designed, so that when the vibration reduction device is used as a transmission space for the elastic waves, the transformation of an elastic wave control equation approximately meets the invariance requirement, so that during vibration reduction, after the elastic waves enter the vibration reduction device from the end face, located on a path that the elastic waves are transmitted to a component to be isolated from vibration, of the vibration reduction device, the transmission direction of the elastic waves bends, and the elastic waves can be transmitted to the other end face of the vibration reduction device along the interior of the vibration reduction device, so that the transmission direction of the elastic waves is changed, and the elastic waves transmitted to the component tobe isolated from vibration are reduced so that the vibration reduction is achieved. According to the technical scheme, the vibration reduction device has an obvious vibration reduction effect on thelow frequency elastic waves within the frequency band range of 332-1800 Hz.

Description

technical field [0001] The present invention relates to the technical field of vibration reduction, in particular to a vibration reduction method, system and vibration reduction device for low-frequency elastic waves. Background technique [0002] Vibration reduction is the main measure taken in engineering to reduce the impact of mechanical vibration on the normal operation of machines, structures or instrumentation equipment, and to prevent vibration hazards. Vibration reduction can be divided into active vibration reduction and passive vibration reduction. Active vibration reduction, also known as active vibration reduction, is mainly composed of vibration detection devices, control devices, actuators and other components. It consumes external energy during work. The vibration detection device first detects the vibration direction and kinetic energy, and the control device controls the actuators to do work to offset vibration. Passive vibration reduction, also known as ...

AI Technical Summary

Problems solved by technology

However, the governing equations of elastic waves are different from the governing equations of electromagnetic waves and acoustic waves. In the transformation from a uniform field to a curved field, the forms of the governing equations of elastic waves will change before and after the transformation, that is, they do not have the invariance before and after the transformation, so Unable to meet the design conditions of the winding material

Moreover, the lower the frequency of the elastic wave, the less the equation satisfies the invariance requirement

Therefore, the traditional transformation method is not suitable for designing winding materials for low-frequency elastic waves.

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