Operator health risk evaluation of off-highway dump truck under shovel loading condition

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• 作者：Yan-hua Shen ; Min Xu ; Chun Jin ; Yu Gao …
• 关键词：dump truck ; loading operation ; impacting force ; discrete element method
• 刊名：Journal of Central South University of Technology
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：22
• 期：7
• 页码：2655-2664
• 全文大小：1,249 KB
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• 作者单位：Yan-hua Shen (1)
  Min Xu (1)
  Chun Jin (1)
  Yu Gao (1)
  Fu-lin Wei (1)
  
  1. School of Mechanical Engineering, University of Science and Technology, Beijing, 100083, China
  
• 刊物类别：Engineering
• 刊物主题：Engineering, general
  Metallic Materials
  Chinese Library of Science
  
• 出版者：Central South University, co-published with Springer
• ISSN：2227-5223

文摘

To evaluate the operator health risk exposed to whole-body vibration (WBV) while the electric-shovel loads the ore on the truck body, the semi-truck mathematical model and 3-D virtual prototype were built to simulate the high shockwave of truck cab under the shovel loading. Discrete element method was utilized to accurately estimate the impacting force on the truck body. Based on the ISO 2631-5 criteria, the S ed is about 0.56 MPa in both models, which means that the dump operators have a high probability of adverse health effects over long-term exposure to these vibrations. The 4-DOF operator model was built to investigate the biodynamic response of seated-human body exposed to WBV in terms of the transmission of vibrations through the body. The results show that the response peak is in the frequency range of 4- Hz corresponding to the primary body resonant frequency.