期刊论文

Analytical solution of transient dynamic response and working condition prediction of bolt considering dynamic and static damping

Zeng, Sheng(usczengs@126.com)

中文

煤炭学报

0253-9993

2016

41

6

1400-1406

10.13225/j.cnki.jccs.2015.1310

国家自然科学基金资助项目（51204098） 湖南省科技厅重点研发计划资助项目（2015SK2058-4） 湖南省重点学科建设资助项目

本校为第一且通讯机构

为了分析动静阻尼条件下锚杆的瞬态动力响应特征以及荷载与锚杆振动基频之间的相互关系,在考虑锚固介质对锚杆产生的动态与静态阻尼力的影响下,基于波动理论建立了锚杆受瞬态激振时引起弹性振动的波动方程。在一端固定一端自由的边界条件下,求解锚杆位移场的解析解,得到基频与荷载之间呈二次幂函数关系。为了验证理论分析的结果,采用室内模型锚杆的拉拔试验和无损检测试验,对不同加载等级下的动测信号进行频谱分析得出对应的基频,采用最小二乘法拟合得到荷载与基频之间的函数关系也呈二次幂函数关系,且施加的荷载小于锚杆体与锚固介质间的握固力时,荷载与基频呈正相关关系,荷载大于握固力时,二者...

In order to analyze the characteristics of transient dynamic response and the relationship between loads and vibration fundamental frequencies of the bolt in the role of damping, in considering the impact of anchoring medium of the bolt on dynamic and static damping and based on wave theory, the wave equation, which is about the elastic vibration of the bolt when suffered by transient excitation, was established. Analytical solution of displacement field of the bolt was solved under the boundary condition that it is fixed at the one end of the ...