期刊论文

Study on Attenuation Law of Displacement Response of Bolt Subjected to Transient Excitation Under Typical Constraint Conditions

中文

黄金科学技术

1005-2518

2017

25

4

26-32

10.11872/j.issn.1005-2518.2017.04.026

国家自然科学基金项目“加锚层状洞室围岩中爆炸扰动效应的作用机制研究”（编号：51204098） 湖南省科技厅重点研发计划“爆炸应力波对复杂节理巷道围岩的扰动效应”（编号：2015SK2058-4）联合资助

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为了研究锚杆在典型约束条件下受瞬态激振作用的响应特征,假定锚杆受激振动的范围均在弹性限度内且截面保持为平面、材料均匀各向同性,基于一维波动理论,根据达朗贝尔原理引入抗剪刚度和摩擦阻尼系数建立锚杆受激振动的波动方程。在求解过程中,引入狄拉克δ函数,运用特征值法得到两端自由和一端自由一端固定2种边界条件下锚杆的位移、速度和加速度场的解析解。分析锚杆受激振时的位移、加速度响应曲线,结果表明:因阻尼影响,一端固定一端自由的锚杆受瞬态激振时位移响应的衰减比两端自由的锚杆要快;另外,受锚杆侧向阻尼和抗剪刚度影响,一端固定一端自由的锚杆加速度响应振动幅值比两端自由状态下...

In order to study the response characteristics of the anchors subjected to transient excitation under typical constraints,it is assumed that the vibration of the anchor rod is within the elastic limit and the section is kept as the plane,materials are homogeneous and isotropic.So,based on the one-dimensional wave theory,the wave equation of the vibration of the anchor is established by the shear stiffness and friction damping coefficient, according to Darren Bell principle.Introducing Dirac function,the analytical solution of the displacement, velocity and acceleration field of the anchor was ...