Author:
Ding Wei,Wang Leizhi,Chen Zhaobo,Ao Hongrui,Yan Hui
Abstract
AbstractFour-degree-of-freedom (4-DOF) human–chair coupling models are constructed to characterize the different contact modes between the head, chest back, waist back and backrest. The seat-to-head transfer ratio (STHT) is used as an evaluation metric for vibration reduction effectiveness. The simulated vibration reduction ratio of the model is close to the experimental results, which proves the validity of the model. The peak STHT is obviously reduced (P < 0.05, T-test) with seat-backrest support. The experiments show that supporting the head ($${a}_{1}$$
a
1
, P < 0.05, Wilcoxon matched-pairs signed ranks) has the best vibration reduction effect (21%), supporting the chest back ($${a}_{2}$$
a
2
, P < 0.05) has a reduced effect (11%), and supporting the waist back ($${a}_{3}$$
a
3
, P < 0.05) has the weakest effect (4%). When the upper torso is in full contact with the backrest, the peak STHT curve and resonance frequency are positively correlated with the contact stiffness of the seat surface and negatively correlated with the contact damping. In order to reduce the seat-to-head transfer ratio, the lowest STHT peak and lowest total energy judgments were proposed as the selection methods for the selection of the contact stiffness and damping of the backrest in two environments (periodic and non-periodic excitation), respectively.
Publisher
Springer Science and Business Media LLC
Reference26 articles.
1. Dong, R. C. & Guo, L. X. Effect of muscle soft tissue on biomechanics of lumbar spine under whole body vibration. Int. J. Precis. Eng. Manuf. 18, 1599–1608 (2017).
2. Dong, R., He, L., Du, W., Cao, Z. & Huang, Z. Effect of sitting posture and seat on biodynamic responses of internal human body simulated by finite element modeling of body-seat system. J. Sound Vib. 438, 543–554 (2019).
3. Guo, Y. P. & Song, G. Q. Ergonomic seat design based on high-speed rail random vibration environment effects on human lumbar. China Mech. Eng. 26, 389–393 (2015).
4. Yoganandan, N., Umale, S., Stemper, B. & Snyder, B. Fatigue responses of the human cervical spine intervertebral discs. J. Mech. Behav. Biomed. Mater. 69, 30–38 (2017).
5. Kelsey, J. L. & Hardy, R. J. Driving of motor vehicles as a risk factor for acute herniated lumbar intervertebral disc. Am. J. Epidemiol. 102, 63–73 (1975).
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献