4.4 Article

Biodynamic response analysis of semi-supine human under varying vertical excitations

出版社

ELSEVIER
DOI: 10.1016/j.ergon.2021.103195

关键词

Apparent mass; Transmissibility; Multi-body model; Semi-supine; Monte-carlo simulation

向作者/读者索取更多资源

The study investigates the biodynamic responses of semi-supine humans exposed to varying vertical vibration magnitudes through a multi-body modeling approach. The calibrated model accurately predicts the decrease in primary resonance frequency with increased vibration magnitude, showcasing nonlinearity in the vertical transmissibility responses of all body segments.
The biodynamic responses of semi-supine humans exposed to varying vertical vibration magnitudes (0.125-1.0 m/s2 r.m.s.) are studied employing a multi-body modeling approach. The model comprises five rigid segments: the head, upper torso, lower torso, thigh, and leg. The viscoelastic property of tissues at joints and body-support interface are incorporated using the Kelvin-Voigt model. The dynamic model parameters identified through optimization are employed to capture the transmissibility responses of different body segments at varying vibration magnitudes. The Monte-Carlo simulation is performed to ascertain the effect of uncertainty of the model parameter and body mass on the biodynamic responses at different vibration magnitudes. The calibrated model accurately predicts the decrease in the primary resonance frequency with the increase in vibration magnitude. This nonlinearity is also apparent in vertical transmissibility responses of all the body segments. The effect of uncertainty of model parameters and body mass on the transmissibility responses is prominent near resonance frequency, while their effect on the apparent mass response is consistent across the entire frequency spectrum. The Monte-Carlo simulation illustrates higher dispersion in the transmissibility responses of the head and thorax at 1.0 m/s2 r.m.s. compared to at 0.125 m/s2 r.m.s. Therefore effective restraint systems are required at the head and thorax to counter the impact of high vibration magnitudes experienced during spaceflight.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.4
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据