冲击地压薄壁圆管吸能构件仿真与试验研究

针对新型螺旋式抗冲击装置中的吸能构件，建立薄壁圆管镂空结构的有限元模型，利用试验对薄壁圆管镂空结构的吸能特性仿真结果进行验证。根据试验验证的模型参数，研究了薄壁圆管竖条结构的竖条数量及长度对其轴向静态压溃屈曲变形、初始峰值力、弹性阶段位移、平均支反力、吸能量、支反力均方差的影响。根据研究规律及防冲立柱实际工况设计薄壁竖条构件并试验，为后续现场冲击地压试验提供依据。研究表明：诱导结构在不改变薄壁圆管材料、厚度及截面形状前提下，使构件的变形更加稳定，压溃屈曲变形形态可控|对于薄壁圆管竖条结构，随着竖条数量增加和竖条长度增加，其初始峰值力、弹性阶段位移减小、吸能量与平均支反力降低，支反力均方差减小。

Simulation and Experimental Research on Energy-absorbing Component of Thin-walled Round Pipe under Rock Burst

This paper establishes a finite element model of the hollow structure of the thin-walled circular tube for the energy-absorbing components in the new spiral anti-impact device. The simulation results of the crushing performance of the hollowed-out thin-walled tube are verified by experiments. According to the model parameters verified by the experiment, the influence of the number and length of the vertical bars of the thin-walled circular tube structure on the axial static load crushing buckling deformation, the initial peak force, the displacement at the elastic stage, the average supporting force, and the suction of the thin-walled circular tube vertical bar structure are studied. The influence of the mean square deviation of energy and reaction force. According to the research rules and the actual working conditions of the anti-scouring column, the thin-walled vertical bar components are designed and tested, which provides the basis for the subsequent field shock pressure test. Studies have shown that the induced structure makes the deformation of the component more stable without changing the material, thickness and cross-sectional shape of the thin-walled tube; for the thin-walled tube vertical bar structure, as the number of vertical bars increases and the length of the vertical bars increases, the initial peak force, In the elastic stage, the displacement decreases, the energy absorption and the average support reaction force decrease, and the mean square error of the support reaction force decreases.