Mine Rescue Chamber Dynamic Numerical Simulation Analysis And Structure Optimization

Mine rescue chamber is a great important rescue equipment for miners to escape andrefuge, but currently mine rescue chamber still has some security risks. This article makes useof finite element method to do antiknock performance of dynamic simulation analysis andstructural optimization, in order to improve the safety and reliability of mine rescue chamber.dynamic impact of mine rescue chamber by coal gas explosion is a complex fluid-structureinteraction processes, this article adopts the decoupling method to solve such problems. First,using finite element numerical simulation method to simulate the explosion shock wave in gasexplosion in tunnels, explosion impact load is determined, as load condition for miningcapsule chamber structure dynamic numerical simulation, and then through simulationcalculation, designed a antiknock performance good mining capsule chamber. Theconclusions are as follows:(1) On the basis of researching the finite element data about mine rescue capsule at homeand abroad, combined TNT equivalent substitute method with numerical simulation method,using AUTODYN to do the numerical simulation of mine gas explosion, by collecting thepressure value of different points to draw the curve of mine gas explosive shock wave, whichprovides load curve for mine rescue capsule force analysis.(2) Due to the flange of the capsule chamber has a great influence on antiknockperformance, design of the internal and external flange two capsule hull structure model,determine the mining capsule dynamic numerical simulation of finite element solutionchamber, through numerical simulation, concluded that outer flange capsule chambermaximum stress is373.88MPa, the maximal displacement17.054mm, and inner flangecapsule the maximum equivalent stress of chamber is407.39MPa, the maximal displacement17.147mm, through comparison and analysis of the data, it is concluded that the flangecapsule hull structure has good antiknock performance, but the maximum stress of the structure beyond the yield strength of material, thus to optimize again.(3) Reinforcement shapes and different installation position has a direct impact oncapsule chamber antiknock performance, installation of reinforcement method is used toanalyze the structure optimization can not only improve chamber antiknock performance canalso save cost. This article takes outside flange capsule hull structure as the object, design thetriangular stiffeners in capsule chamber, triangular stiffeners capsule chamber, squarereinforced capsule chamber and square reinforced capsule chamber four capsule tank shellmodel, the above four capsule chamber antiknock performance simulation analysis, it isconcluded that the square outside the stiffener capsule chamber maximum equivalent stress is225.37MPa, within the scope of the material yield strength, therefore, the square outside thestiffener capsule chamber is a better antiknock performance hull structural model.