凿岩机瞬态冲击动力特性分析

丁问司,卿涛

振动与冲击 ›› 2021, Vol. 40 ›› Issue (23) : 1-8.

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PDF(1584 KB)
振动与冲击 ›› 2021, Vol. 40 ›› Issue (23) : 1-8.
论文

凿岩机瞬态冲击动力特性分析

  • 丁问司,卿涛
作者信息 +

Analysis of transient impact dynamic characteristics of rock drill

  • DING Wensi, QING Tao
Author information +
文章历史 +

摘要

为研究凿岩机冲击部件瞬态冲击动力特性,以弹性体一维振动瞬态应力波传播理论为基础,将冲击碰撞问题转化为具有初始速度及内部应力波的振动响应问题并建立理论模型。利用瞬态波函数特征值展开法求解冲击过程中各冲击部件的瞬态响应函数,获得冲击分离过程钎杆内部应力波传播特性。通过试验结果与数值计算结果的对比,验证了理论分析所获得的瞬态响应函数的正确性。研究中,通过改变钎杆直径、钎杆长度以及冲击活塞速度得出了诸因素对凿岩机撞击力、钎杆能量利用率等工作特性的影响。实际工作中可以根据不同的工况合理地选择冲击部件。研究结果为优化凿岩机工作能力提供了理论依据和参考。

Abstract

In order to study the transient impact dynamic characteristics of rock drill impact components, the one-dimensional vibration transient stress wave propagation theory was adopted to transform the collision problem into the vibration response problem with initial velocity and internal stress wave, and a theoretical model was established. The transient response functions of each impact component in the impact process were solved by using the eigenvalue expansion method of the transient wave function to obtain the propagation characteristics of the stress wave inside the drill rod during the impact separation process. By comparing experimental with numerical, the correctness of the transient response function obtained by theoretical analysis was verified. By changing the diameter, length of the drill rod and the impacting speed of the piston, the influences of various factors on the impact force and the energy utilization rate of the drill rod were obtained. The impact components could be selected reasonably according to different working conditions in the project. The research results provided theoretical basis and reference for optimizing the working ability of rock drill.

关键词

冲击振动 / 波动理论 / 冲击动力响应 / 凿岩机

Key words

 Impact vibration / Wave theory / Dynamic Response of impact / rock drill

引用本文

导出引用
丁问司,卿涛. 凿岩机瞬态冲击动力特性分析[J]. 振动与冲击, 2021, 40(23): 1-8
DING Wensi, QING Tao. Analysis of transient impact dynamic characteristics of rock drill[J]. Journal of Vibration and Shock, 2021, 40(23): 1-8

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