【摘要】 焊接作业中长期使用不良姿势，容易加速作业疲劳，导致工作相关肌肉骨骼疾患。为了探究作业姿势与疲劳的影响机理，首先，基于人体工效学对典型的不良作业姿势进行改善；其次，以一线焊工为实验对象，通过表面肌电实验，测量焊工左右竖脊肌的表面肌电信号，对两种作业姿势作业过程中的肌肉疲劳特征进行研究；最后，根据实验结果，通过Jack对改善前后的作业姿势进行仿真验证。结果表明：作业姿势改善后效果良好，积分肌电值iEMG下降33.28%，均值方根（RMS）下降39.38%,L4/L5脊椎处压力减少69.8%。更多还原

【Abstract】 Long term use of poor posture in welding operations can accelerate work fatigue and lead to work-related musculoskeletal disorders. In order to explore the impact mechanism of homework posture and fatigue, firstly, based on ergonomics, typical bad homework postures are improved. Secondly, taking frontline welders as experimental subjects, surface electromyography experiments were conducted to measure the surface electromyographic signals of the left and right erector spinae muscles of the welders, and to study the muscle fatigue characteristics during the operation process in two different postures. Finally, based on the experimental results, Jack was used to simulate and verify the homework posture before and after improvement. The results showed that the improvement in homework posture had a good effect, with a 33.28% decrease in iEMG, a 39.38% decrease in root mean square(RMS), and a 69.8% decrease in pressure at the L4/L5spine.更多还原