凿岩机瞬态冲击动力特性分析

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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.

Key words： Impact vibration Wave theory Dynamic Response of impact rock drill

Received: 08 September 2020 Published: 15 December 2021

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	DING Wensi
	QING Tao

Cite this article:

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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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2021/V40/I23/1

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