Analysis on the Anti-Seismic Dynamic Response of Steel Structure Derrick in Mines under Seismic Excitation

Guoqing Liu

College of Intelligent Manufacturing, Huainan ｕｎｉｏｎ University, Huainan, 232001, China

Abstract: This electronic document is a “live” template. The various components of your paper [title, text, heads, etc.] are already defined on the style sheet, as illustrated by the portions given in this document. (Abstract) Taking the steel derrick of a coal mine as the research object, the tensile stiffness and vibration damping force of each wire rope are calculated by analyzing the elastic body theory and equivalent principle, and the structural model of the mine steel structure Derrick is constructed according to the calculation results. Through the simulation experiment, the seismic dynamic response of the mine steel structure Derrick under seismic excitation is analyzed. Firstly, the multi-mass point spatial bar system model is used to draw the seismic influence coefficient curve, and the low-order mode is taken to analyze and improve the calculation accuracy. Secondly, the vibration mode decomposition response spectrum method is used to calculate the hoisting inclined steel Derrick, and the seismic influence coefficient curve is drawn according to the simulated seismic fortification intensity and characteristic period data by time history analysis. In order to analyze the natural vibration period and vibration mode participation quality, the solution is carried out according to MIDAS Civil finite element software. And finally, according to the transient dynamics, the structural strength under the worst working condition in the results is calculated, and the stress time-history curve at the maximum stress is obtained. The results show that, in case of earthquake, the stress intensity requirement is met by the method of this paper.

Keywords: Seismic excitation; Steel structure derrick; Anti-seismic dynamic response