doi:10.16186/j.cnki.1673-9787.2020.6.23

Received:2020/02/19

Revised:2020/04/16

Published:2020/11/15

Theory and implementation of vibrational absorbing method in vibrational control ofproduction workshop in coal preparation plant

WANG Xiancheng1, ZHANG Fengjian1, ZHANG Yimin2, GONG Yaoqing2

1.School of Civil and Transportation Engineering， Henan University of Urban Construction， Pingdingshan  467036 ， Henan， China；2.School of Civil Engineering， Henan Polytechnic University ，Jiaozuo  454000 ， Henan， China

Abstract:In order to solve the problem of vibration damage caused by vibrating sieves in the production plant of mineral processing enterprise， the theory and practice of vibration absorption method were studied for the purpose of controlling the vibration damage of production workshop by taking the main workshop structure of the No. 8 coal preparation plant of Pingdingshan coal group as an example. The frame-beam fixing a vibrating sieve was simplified to a Timoshenko beam with spring support at both ends， and then the dynamic equations of the dynamic system composed of a vibrating sieve， an elastic supported Timoshenko beam and a vibration absorber were developed so as to obtain the principle （ theoretical formula） for absorbing the vibration of the beam ， and then the composition and function of a vibrational absorbing structure were discussed. On the foregoing basis，a vibrational absorbing experimental study was carried out. Finally，the engineering application and practice of a vibrational absorbing structure are completed. The theoretical and experimental as well as implementary results showed that the vibration absorption structure could absorb more than 90% of the vibrational amplitude of the frame-beam fixing a vibrating sieve， indicating that the vibration absorption method was an effective method to control the structural vibration of the production workshop in the coal preparation plant. The key technology of vibration absorption was to correctly deal with the problem of the vibrational separation between the workshop structure and a vibrational absorbing structure， or the problem of unidirectional transmission of the vibration between the workshop structure and a vibrational absorbing structure.

Key words:vibrational absorbing method;vibrational control of structure;vibrational absorbing structure;Timoshenko beam

吸振方法在选煤厂生产厂房振动控制中的理论与实践_王现成.pdf