Biomechanical response of the musculoskeletal system to whole body vibration using a seated driver model
Biomechanical response of the musculoskeletal system to whole body vibration using a seated driver model
复制标题
使用坐着的驾驶员模型研究肌肉骨骼系统对全身振动的生物力学响应
DOI：
10.1016/j.ergon.2014.12.006
复制
发表时间：
2015-02-01
影响因子：
3.1
通讯作者：
Li, Zengyong
中科院分区：
文献类型：
--
作者：
Li, Wenhao;Zhang, Ming;Li, Zengyong
目的：本研究旨在评估靠背倾斜度和振动频率对肌肉活动的影响，在动态环境中使用musculoskeletal model.Method：肌肉活动建模方法被用来分析一个坐着的人的全身肌肉骨骼系统与公共领域刚体模型在可调汽车座椅。基于逆动力学方法，利用AnyBody Modeling System建立了该模型。最小/最大准则处理肌肉冗余问题。10名健康受试者暴露于全身振动（WBV）与五个频率（3，4.5，6，7，和8 Hz）在垂直方向上在一个随机的顺序在三个独立的天。使用混合Polaris光谱系统测量座椅板和头部的位移，以获得座椅到头部（STH）的传递率。使用近红外光谱测量肌肉氧合。结果：增加振动频率可引起腹部和右腿的高肌肉活动，且靠背前倾角度越大，模型的有效性越高。除15 °和30 °倾角外，靠背向后倾斜时左腿的肌肉活动减少。在靠背倾斜角度为5和振动频率为5 Hz时，腰椎的肌肉活动突然增加。结论：振动频率显著影响腰椎区肌肉活动。同样，靠背的倾斜程度显著影响右腿和腹部的肌肉活动。靠背的振动和向前倾斜的组合可用于最大化腿部的肌肉活动，类似于腹部和腰部肌肉。与行业的相关性：本研究建立的肌肉骨骼模型为研究坐姿驾驶员对WBV的生物力学响应提供了一种方法。这种模式有助于保护司机免受职业伤害。(C)2014爱思唯尔有限公司版权所有。
Objective: This study aimed to assess the effects of backrest inclination and vibration frequency on muscle activity in a dynamic environment using a musculoskeletal model.Method: The muscle activity modeling method was used to analyze a full body musculoskeletal system of a seated person with a public domain rigid body model in an adjustable car seat. This model was established using AnyBody Modeling System, based on the inverse dynamic approach. And the min/max criterion in dealing with the muscle redundancy problem. Ten healthy subjects were exposed to whole body vibration (WBV) with five frequencies (3, 4.5, 6, 7, and 8 Hz) in the vertical direction in a randomized order on three separate days. The displacement of the seat-pan and head was measured using a hybrid Polaris spectra system to obtain the seat-to-head (STH) transmissibility. Muscle oxygenation was measured using near-infrared spectroscopy. The validity of the model was tested using STH transmissibility and muscle oxygenation.Results: Increased vibration frequency caused high muscle activities of the abdomen and the right leg with a backrest forward inclination angle. The muscle activities of the left leg decreased at a backrest backward inclination except at inclination angles of 15 and 30. Muscle activity of the lumbar suddenly increased at a backrest inclination angle of 5 and vibration frequency of 5 Hz. Muscle activities were higher under vibration than that without vibration.Conclusion: Vibration frequency significantly affected the muscle activity of the lumbar area. Likewise, the inclination degree of the backrest significantly affected the muscle activities of the right leg and the abdomen. The combination of vibration and forward inclination of the backrest can be used to maximize the muscle activity of the leg, similar to the abdomen and lumbar muscles. Relevance to the industry: The musculoskeletal model established in the present study provides a method that can be used to investigate the biomechanical response of seated drivers to WBV. This model helps protect drivers from occupational injury. (C) 2014 Elsevier B.V. All rights reserved.