Research On Corrugated Layered Energy Absorbing Components Of Top Beam Of Scouring-proof Hydraulic Support

The frequent occurrence of rock burst has seriously affected the mining of deep coal and caused great casualties and losses to staff and equipment,so the prevention of rock burst is an urgent problem to be solved.The hydraulic support with anti-scour and energy-absorbing support has a very positive effect on the prevention of rock burst,and its energy-absorbing components bear the main anti-scour and energy-absorbing components.At present,there are few comparative studies on the energy absorbing components of the roof beam of the anti-impact hydraulic support,so it is of great significance to study the energy absorbing components of the roof beam of the anti-impact hydraulic support.In this paper,according to the parameters of the top beam of the anti-impact and energy-absorbing hydraulic support,corrugated laminated energy-absorbing components are proposed,and three different corrugated core structures,triangular,trapezoidal and sinusoidal,are determined.The corrugated cascade energy absorber has the advantages of relatively large energy absorption capacity,relatively good yielding capacity,and the number of layers can be selected according to the corresponding demand height.Firstly,ANSYS workbench optimization module is used to optimize the parameters of three kinds of corrugated elements at 60 mm height.It is concluded that the optimum angle of triangular corrugated elements is 30 degrees,the thickness is 2.9 mm,the optimum vertical angle of trapezoidal corrugated elements is 34 degrees,the thickness is 4.2 mm,and the optimum parameters of sinusoidal corrugated elements are 1/12,and the thickness is 3.2 mm.m.On the basis of the optimal parameters,three kinds of three-dimensional models of corrugated energy absorbing components with different layers are established,and the finite element simulation is carried out.By analyzing the reaction force,energy absorption-displacement curve and buckling deformation of three kinds of corrugated structures at the same height,the results show that the sinusoidal energy absorption effect is the best in single-layer corrugated core structure,and the triangular corrugated transverse-vertical stacking effect is the best in two-layer height and four-layer height.The energy absorption,plastic deformation displacement and the number of layers of three kinds of energy absorption components are multiplied.On the basis of simulation,this paper compares and analyses the three kinds of corrugated members in different layers and different stacking forms.The results show that the energy absorption effect of sinusoidal corrugates is the best in single-layer structure;triangularcorrugates are the best in two-layer height;and sinusoidal corrugates are the best in four-layer height.With the increase of the number of layers,the indexes of horizontal and vertical cascade basically conform to the multiplier relationship,while the two-layer structure of top-angle cascade does not conform to the multiplier relationship,but the four-layer structure conforms to the multiplier relationship.Finally,by comparing the simulation with the experiment,the trend of deformation and data change is basically the same;the simulation results are slightly different from the test results due to the processing error of the test piece and the relatively uneven stress in the test process,with an average gap of about 15%.This paper has 113 figures,22 tables and 63 references.