矿井自动隔离门强度的数值模拟分析

Numerical simulation and analysis of strength of automatic isolation door in mine

为了探明矿井毒害气体自动隔离门的门皮厚度、工字梁尺寸、支撑间距在瓦斯爆炸产生的冲击载荷作用下对隔离门强度的影响,利用有限元软件ANSYS Workbench,分析了自动隔离门的应力、应变场及其影响。结果表明:当门皮厚度增大至12 mm、工字梁尺寸增大至16#时,隔离门应力值低于屈服极限值235 Mpa,且形变较小,满足防爆要求,支撑间距变化过程中,应力值始终大于屈服极限值;隔离门应力值随着门皮厚度、工字梁尺寸增大而减小,随着支撑间距增大而增大;通过极差分析,对应力值影响主次关系为:工字梁尺寸、门皮厚度、支撑间距。该研究对合理确定矿井瓦斯爆炸毒害气体自动隔离门的结构和尺寸具有一定的参考。

This paper arises from the need for identifying the effect of door skin thickness,I-shaped beam size,and support spacing of the automatic isolation door for poison gas on the strength of isolated gate when exposed to impact loading due to the gas explosion. The study analyzes the automatic isolating door for stress and strain field and its influence using the finite element software ANSYS Workbench. The results show that in the case of the door skin thickness greater than 12 mm and I-beam size up to 16,an isolation door which has a stress value lower than the yield limit 235 Mpa and experiences a smaller deformation is adequate for the explosion-proof requirements; the stress value is always greater than the yield limit if the spacing of the support is in the process of change; the isolation gate has a decreasing stress value due to an increase in the door skin thickness and flanged beam size; and an increasing stress value due to an increase in the spacing of the support. Range analysis shows that the relationships between primary and secondary affecting the stress values are I-shaped beam size,door skin thickness and spacing of the support. The study may provide references to the reasonable determination of the structure and the size of automatic isolation doors tailored for the gas explosion poison gas in the mines.