A linked electromagnetic hammer suitable for laboratory research on multi-point ground motion

Abstract

The invention discloses a linkage electromagnetic hammer applicable to researching multi-point seismic oscillation in a laboratory. The hammer comprises a shell made of insulating material, multiple stages of electromagnetic hammer bodies are sequentially arranged in the shell from left to right, the leftmost electromagnetic hammer body is the first-stage electromagnetic hammer body, and the rightmost electromagnetic hammer body is the last-stage electromagnetic hammer body; a linkage switch is arranged between every two adjacent stages of electromagnetic hammer bodies; each linkage switch is an electromagnetic loop switch of the corresponding right-stage electromagnetic hammer body, and the corresponding left-stage electromagnetic hammer body moves to drive the linkage switch to be switched on. The linkage electromagnetic hammer overcomes the defects that an impact loading device in an existing laboratory for hammer drop and hammer swing is small in application range, poor in repeatability and long in dynamic responding time and is combined with the advantages of the existing electromagnetic impact device, and continuous and wide-area stimulation of a vibration source is achieved.

Description

technical field [0001] The invention relates to a laboratory vibration source excitation device, in particular to a linked electromagnetic hammer suitable for laboratory research on multi-point ground motion. Background technique [0002] Vibration source excitation devices commonly used in laboratories at this stage include gravity hammers, small-caliber rifles, explosives, and electromagnetic hammers. The excitation mode of the gravity hammer in these vibration source excitation devices has poor repeatability, small application range, long dynamic response time, and when used in conjunction with timing systems or shooting systems, delay control is difficult; During the experimental process, a large number of fragments will fly out due to the explosion, and there is a greater danger; the existing electromagnetic hammer has the advantages of reusability, rapid dynamic response, wide application range and stable loading, but it cannot excite continuous and wide-area source o...

AI Technical Summary

Problems solved by technology

The excitation mode of the gravity hammer in these vibration source excitation devices has poor repeatability, small application range, long dynamic response time, and when used in conjunction with timing systems or shooting systems, delay control is difficult; During the experimental process, a large number of fragments will fly out due to the explosion, and there is a greater danger; the existing electromagnetic hammer has the advantages of reusability, rapid dynamic response, wide application range and stable loading, but it cannot excite continuous and wide-area vibration source

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