矿用扩径式吸能防冲构件特性数值分析

发布时间：2018-07-13 17:37

【摘要】：为增强液压立柱抗冲性能,有效防治煤矿冲击地压,或在一定程度上减小冲击地压事故造成的损失,提出并设计了一种与液压立柱结合使用的扩径式吸能构件.采用ABAQUS软件对构件吸能防冲特性进行研究,结果表明:不同尺寸和不同材料扩径式构件均具有非常好的稳定变形破坏模式,尺寸、材料和冲击速度对构件变形破坏模式没有任何影响.扩径式构件压缩过程中具有较为恒定的反作用力,反作随构件材料强度和随壁增加而增大,但尺寸、材料和冲击速度对构件力-位移变化规律没有影响.扩径式构件具有一定承载力,具有较小的载荷波动系数和较高的冲程效率.扩径式构件是一种较为理想的吸能防冲构件,其与现有常规立柱结合使用,可改善立柱受冲击载荷时的受力情况,增强立柱防冲性能.
[Abstract]:In order to enhance the impact resistance of hydraulic column, prevent and cure the impact ground pressure of coal mine effectively, or reduce the loss caused by impact ground pressure accident to a certain extent, a kind of expanding type energy absorption component combined with hydraulic column is proposed and designed. Abaqus software is used to study the energy absorption and anti-impact characteristics of the components. The results show that the different sizes and different materials have a very good stable deformation failure mode and size. The material and impact velocity have no effect on the deformation and failure mode of members. There is a constant reaction force in the compression process of the expanded members, which increases with the increase of the material strength and the wall, but the size, the material and the impact velocity have no effect on the variation of the force-displacement of the members. The expanding member has certain bearing capacity, small load fluctuation coefficient and high stroke efficiency. The expanded diameter member is an ideal energy absorption and scour proof member, which can be used in combination with the existing conventional columns to improve the bearing capacity of the columns under impact load and enhance the anti-impact performance of the columns.
【作者单位】：辽宁工程技术大学矿山安全技术装备研究院;辽宁工程技术大学力学与工程学院;辽宁工程技术大学研究生院;
【基金】：辽宁省教育厅科技研究项目(L2015218) 辽宁工程技术大学生产技术问题基金项目(15-T-001)
【分类号】：TD324.2

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