Department of Civil and Environmental Engineering, College of Engineering, The University of Iowa, Iowa City, IA 52242, USA.
J Biomech. 2012 Apr 5;45(6):925-30. doi: 10.1016/j.jbiomech.2012.01.022. Epub 2012 Feb 13.
An active head-neck model is introduced in this work to predict human-dynamic response to different vibration magnitudes during fore-aft whole-body vibration. The proposed model is a rigid-link dynamic system augmented with passive spring-damper tissue-like elements and additional active dampers that resemble the active part of the muscles. The additional active dampers are functions of the input displacement, velocity, and acceleration and are based on active control theories and a kd-tree data-searching scheme. Five human subjects exposed to random fore-aft vibration with frequency content of 0.5-10 Hz were tested under different vibration with magnitudes of 0.46 m/s(2), 1.32 m/s(2), and 1.66 m/s(2) rms. The results showed that the proposed model was able to reasonably capture the softening characteristics of the human head-neck response during fore-aft whole-body vibration of different magnitudes.
本文提出了一种主动头颈部模型，用于预测人体在前后全身振动中不同振动幅度下的动态响应。所提出的模型是一个刚性链接动力学系统，增加了被动弹簧阻尼组织样元件和附加的主动阻尼器，这些主动阻尼器类似于肌肉的主动部分。附加的主动阻尼器是输入位移、速度和加速度的函数，基于主动控制理论和 kd-树数据搜索方案。五个人体受试者在不同振动幅度下（0.46 m/s(2)、1.32 m/s(2)和 1.66 m/s(2)rms）暴露于频率内容为 0.5-10 Hz 的随机前后振动中进行了测试。结果表明，该模型能够合理地捕捉到不同幅度前后全身振动中人体头颈部响应的软化特性。
