Operator health risk evaluation of off-highway dump truck under shovel loading condition
来源期刊：中南大学学报(英文版)2015年第7期
论文作者：SHEN Yan-hua XU Min JIN Chun GAO Yu WEI Fu-lin
文章页码：2655 - 2664
Key words：dump truck; loading operation; impacting force; discrete element method
Abstract: 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 Sed 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 4-6 Hz corresponding to the primary body resonant frequency.
SHEN Yan-hua(申焱华), XU Min(许敏), JIN Chun(金纯), GAO Yu(高玉), WEI Fu-lin(魏福林)
(School of Mechanical Engineering, University of Science and Technology, Beijing100083, China)
Abstract: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 Sed 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 4-6 Hz corresponding to the primary body resonant frequency.
Key words:dump truck; loading operation; impacting force; discrete element method
