煤矿井下救生舱壳体的强度分析与结构优化

发布时间：2018-04-28 03:49

本文选题：瓦斯爆炸 + 可移动式救生舱　；参考：《辽宁工程技术大学》2013年硕士论文

【摘要】：在我国大部分矿井中，瓦斯煤尘爆炸、顶板坍塌、水灾、火灾等事故的发生率非常高，不仅造成了严重的经济损失，还导致大量的人员伤亡。因此，世界各国都在大力研制井下救生舱，为事故发生时来不及撤离的工作人员提供安全的避险空间。救生舱能够抵御外界的爆炸冲击，还能为被困人员提供水、食物和氧气，隔绝和去除有毒有害气体，为被困人员提供良好的生存环境，使其获得一定的生存时间。在避险的同时，被困人员还可以通过舱内的通讯设施，为外界救援指明方向。因此，救生舱的抗爆性能就显得至关重要。本项目通过分析国内外相关文献，针对矿用可移动式救生舱，利用ANSYS和LS-DYNA软件建立矿用可移动式救生舱壳体三维有限元模型。模拟了等效三角波爆炸冲击荷载作用下矿用可移动式救生舱壳体的动态响应。通过以上数值模拟，确定救生舱壳体动态承载能力和变形模式，给出瓦斯/瓦斯煤尘爆炸超压与救生舱承载能力和变形模式的变化规律。根据分析结果，对救生舱的结构进行了优化分析，为救生舱设计、抗冲击能力的评价提供理论指导和依据。通过对救生舱壳体的动态分析，可以判断该救生舱结构能承受峰值超压为正门0.6MPa、其他面0.3MPa、作用时间为300ms的冲击荷载作用，，结构强度满足要求，刚度也满足位移要求。通过结构优化，在强度和刚度满足要求的条件下，节省了材料和成本。
[Abstract]:In most mines in China, the incidence of gas and coal dust explosion, roof collapse, flood, fire and other accidents is very high, not only caused serious economic losses, but also caused a large number of casualties. Therefore, countries all over the world are making great efforts to develop underground lifebuoys to provide safe haven space for workers who have no time to evacuate when accidents occur. The lifebuoy can resist the impact of explosion, provide water, food and oxygen to the trapped personnel, isolate and remove the poisonous and harmful gases, and provide a good living environment for the trapped persons, so that they can obtain a certain survival time. At the same time, trapped people can also through the cabin communication facilities, for outside rescue direction. Therefore, the anti-explosion performance of the capsule is very important. Based on the analysis of domestic and foreign literatures, the 3D finite element model of mine movable lifebuoy shell is established by using ANSYS and LS-DYNA software. The dynamic response of mine movable lifebuoy shell under the equivalent triangular wave blast impact load is simulated. Based on the above numerical simulation, the dynamic load carrying capacity and deformation mode of the lifebuoy shell are determined, and the variation law of the gas / gas coal dust explosion overpressure and the load bearing capacity and deformation mode of the capsule are given. According to the analysis results, the structure of the lifebuoy is optimized and analyzed, which provides theoretical guidance and basis for the design and evaluation of the impact resistance of the lifebuoy. Through the dynamic analysis of the lifebuoy shell, it can be judged that the lifebuoy structure can withstand the peak overpressure of 0.6 MPa at the front door and 0.3 MPa on the other surfaces. The action time is the impact load of 300ms, the structural strength meets the requirements and the stiffness meets the displacement requirement. Through structural optimization, the material and cost are saved under the condition that strength and stiffness meet the requirement.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD774

【参考文献】