Mechanics & Industry
Volume 24, 2023
|Number of page(s)||9|
|Published online||25 July 2023|
Effects of cutting head load on fatigue life of bolter miner cutting arm
China Coal Research Institute, Beijing, China
2 CCTEG Taiyuan Research Institute Co., Ltd, Taiyuan, China
3 China National Engineering Laboratory for Coal Mining Machinery, Taiyuan, China
4 Taiyuan University of Technology, Taiyuan, China
* e-mail: email@example.com
Accepted: 28 June 2023
In the operation of bolter miners, the cutting arm is an essential and weak part and its fatigue life directly affects its performance. This study aimed to investigate the influence of the cutting head load on the fatigue life of a cutting arm using the DEM-MFBD (Discrete Element Method-Multi Flexible Body Dynamics) bi-directional coupling technique. The EJM340 bolter miner was chosen as the research object, and a three-dimensional solid model of the bolter miner was built using the RecurDyn software. The cutting arm was flexibly modelled, and the tunnel model was built using the EDEM software. The motion parameters of the bolter miner and cutting head load were transferred through the bi-directional coupling interface to obtain the loads and stress parameters during the entire tunnel cutting process. Based on the stress-time variation, the fatigue life of the cutting arm was calculated, the overall damage and crack initiation locations were obtained, and the minimum number of cutting arm cycles was determined. The accuracy of the virtual model is verified through field experiments. The analysis results indicated that the crack emergence location and fatigue life obtained from the simulation were in agreement with the experimental results.
Key words: Fatigue analysis / bolter miner / cutting arm / rigid flexible coupling simulation
© A. Li et al., Published by EDP Sciences 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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