FEM Analysis of Escape Capsule Suffered to Gas Explosion
Escape capsules are new devices for underground coal mines that provide air,water,food and supplies in the event of an emergency in where miners are unable to escape.It is difficult to carry out the experiments of explosion and safety because the danger and nonrepeatability of explosion.The structure deformation and distribution of equivalent stress has been investigated under different impact pressure conditions including unimodal and bimodal loads based on the FEM and software LS-DYNA.The results show that the distribution of deformation and equivalent stress has the same trend on the same surface with the increment of explosion pressure.The deformation and stress are larger with side impact pressure compared with that of the same front impact pressure.Furthermore,the maximum equivalent stress is 246MPa and 260MPa on the front and sides of capsule with five times for national standard impact pressure 1.5MPa.Under these conditions,the deformation is less than about 9.97mm and 10.47mm,respectively.When the front impact pressure is 2.0MPa,the deformation of capsule still belongs to elasticity but the less plastic deformation occurs on the Ushape stiffening channels with the same side impact pressure.However,it is safe for capsule structure because the equivalent stress 283MPa is much less than the tensile strength.It is noted that bimodal load accelerates the capsule deformation so that it is more dangerous compared with unimodal load.
Escape Capsule FEM Gas Explosion Deformation Bimodal Load
Chang-lu LI Rui-bin MEI Chang-sheng LI Ban CAI Xiang-hua LIU
Liaoning Technical University,Fuxin 123000,China;Shenyang Research Institute of Coal Technology & En State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110819,China;Northeastern U State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110819,China
国际会议
沈阳
英文
995-1001
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）