Response Analysis of Four-link Bearing Characteristics of Shield Hydraulic Support
As the supporting part of the hydraulic support,the four-link is prone to instability and damage under the impact load.In basis of the bearing characteristics of the top beam,the mechanical response characteristics of the four linkage of the hydraulic sup-port are further studied by analyzing the coupling state between the hydraulic support and the surrounding rock under different attitudes.Based on the Denavit-Hartenberg(D-H)theory and MATLAB software,a dynamic model of the full attitude of the hydraulic support is established,and the influence of different hinge positions of the equilibrium jack and the column on the four-link load is analyzed.The results show that the closer the position of the column and the equilibeium jack is to the front end of the top beam,the larger the load of the four linkages of the support is,and the larger the maximum value of the corresponding load is.The maximum position of the front linkage moves towards the coal wall and the rear linkage moves towards the goaf.The forward movement of the installation position of the column and equilibeium jack increases the load on the four connecting rods.Therefore,a reasonable design of the bracket structure can optimize the load on the bracket to a certain extent.
impact loadcanopy of supportcoupling of surrounding rockoptimization design
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