Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Biomechanical analysis and optimization of neck adaptation in infantry helmet movement
| DOI: | 10.11809/bqzbgcxb2024.10.032 |
| Keywords: | helmet; musculoskeletal model; biomechanics; motion adaptation; optimization |
| Abstract: | To address the adaptability issues related to different head movements of infantry soldiers wearing helmets, a head neck helmet musculoskeletal model was established, considering movements such as flexion, lateral bending, and rotation. The model’s accuracy was verified through surface electromyography experiments. The study examined the muscle activation and intervertebral joint force characteristics of neck muscles during various head movements, analyzing the impact of helmet mounted equipment positions on neck muscle activation changes during different motions. Utilizing a multi objective particle swarm optimization algorithm, the helmet mounted equipment position was optimized using the minimal maximal muscle activation of the neck muscles under three head movements as optimization objectives, enhancing the helmet’s adaptability for diverse combat tasks.The study yielded the following findings: compared to the neutral head position, neck muscle activation significantly increased by 1 551.21% during 30° of neck extension, 885.42% during 40° of lateral bending, and 35.23% during 40° of rotation. Maximum intervertebral pressure at the T1C7 junction was observed during neck extension and rotation. In comparison to the neutral head position, intervertebral pressure at T1C7 increased by 35798% during 30°of neck extension and by 10.71% during 40° of rotation. During lateral bending, the largest intervertebral shear forces occurred at the C1C0 and T1C7 segments, exhibiting identical magnitudes but opposing directions. In comparison to the neutral position, the maximum shear force during 40° of lateral bending increased from nearly 0 N to 104.71 N. For multi movement adaptation, the optimal range of the helmet mounted equipment center of mass position was found to be (0.001 7~0.048 9 m, 006~0.08 m, -0.08~0.08 m). |
| Issue: | Vol. 45 No. 10 (2024) |
| Published: | 2024-10-31 |
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