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针对因矿井应急救生舱模拟爆破冲击时分析数据缺乏而严重影响救生舱的开发设计问题,同某企业合作对救生舱进行了结构瞬态响应分析和优化设计,分析了不同压力和作用时间工况下,舱体封头和舱体正面的应力、应变、冲击变形及回弹情况。结果表明:舱体封头受到的应力2.0MPa时变形量过大,所以门板可以设计成骨架的扁箱体结构,以增强该部位的结构强度和刚度;舱体受0.5MPa压力冲击力时只发生弹性变形,随着冲击峰值的变大,变形量急剧增大,塑性变形占主导地位。变形过程在冲击载荷衰减为零后,还要延续一段时间,之后发生一定量的回弹,同时舱体的回弹能力急剧下降。本文在结构数值分析的基础上对舱体结构进行了参数化设计,通过对救生舱结构主要设计参数变化对其抵抗冲击能力的趋势分析可知:在允许范围内,应尽量增加支撑筋骨的高度B1并减少波纹板宽度L2及边部支撑筋骨厚度B2,以增强救生舱抵抗冲击的能力。
In view of the lack of analytical data in the simulation of blasting impact in the mine emergency rescue capsule and the serious impact on the development and design of the rescue capsule, the structural transient response analysis and optimization design of the rescue capsule was carried out in cooperation with a certain enterprise. The analysis of different pressure and working time conditions Under the head of the cabin and the front of the cabin stress, strain, impact deformation and rebound. The results show that the deformation of deck head is too large when the stress is 2.0MPa, so the door can be designed as a flat box structure of the skeleton to enhance the structural strength and rigidity of the structure. When the cabin is subjected to 0.5MPa pressure impact force With the elastic deformation, with the impact of the peak value becomes larger, the amount of deformation increases sharply, the plastic deformation dominates. Deformation process in the impact load attenuation is zero, but also for some time, after a certain amount of rebound occurred, while the resilience of the cabin abrupt decline. Based on the numerical analysis of the structure, the structure of the cabin was parametrically designed. Based on the analysis of the change of the main design parameters of the rescue cabin against its impact resistance, the height of the supporting bones should be increased as much as possible And reduce the width of the corrugated board L2 and the thickness of the side support bones B2 to enhance the ability of the rescue cabin to resist impact.