文章摘要
闫安志,张迅.车桥耦合振动下直流电刺激肌肉的动力响应分析[J].声学技术,2019,38(3):317~322
车桥耦合振动下直流电刺激肌肉的动力响应分析
Dynamic response analysis of direct current stimulating muscle under the train-bridge coupling vibration
投稿时间:2018-03-10  修订日期:2018-04-15
DOI:10.16300/j.cnki.1000-3630.2019.03.014
中文关键词: 车桥耦合|电刺激|体位|有限元
英文关键词: train-bridge coupling vibration|electrical stimulation treatment|posture|finite element analysis
基金项目:
作者单位E-mail
闫安志 河南理工大学土木工程学院, 河南焦作 454000  
张迅 河南理工大学土木工程学院, 河南焦作 454000 zhangxun_gz@163.com 
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中文摘要:
      当前,电刺激治疗应用广泛。对于经常出差的亚健康人士,若在旅途中选择电刺激治疗,不可避免地会受到车桥耦合振动的影响。在这种条件下,何种乘坐方式能达到较好的治疗效果尚不清楚。首先利用COMSOL有限元分析软件建立三跨连续梁桥和两自由度移动系统列车耦合模型,其次通过多体动力学模块设置接触对,实现车桥的耦合接触,计算列车的振动响应,最后将该响应和电刺激信号同时施加给不同体位的肌肉,得到相应的位移、频谱和应力等结果。对比分析发现,肌肉在直立体位下,受列车振动影响较大,振动不易控制;平躺体位下与静止状态的振动响应相近,但振幅和周期略有减小。研究结果为选择合理体位,达到更好的治疗效果提供了参考。
英文摘要:
      Currently, electrical stimulation treatment is widely used. For sub-health people who travel frequently and want to receive electrical stimulation treatment during the journey, the treatment will inevitably be affected by train-bridge coupling vibration. It is not clear what kind of riding mode can achieve better therapeutic effect under this condition. Therefore, in this paper the COMSOL finite element analysis software is used to set up a coupling model between the three-span continuous girder bridge and the train with two degrees of freedom mobile system, and to calculate the train vibration response by using multi-body dynamics module and setting contact pairs to achieve the train-bridge coupling contact. And then, the response and the electrical stimulation signals are simultaneously applied to different positions of the muscle to get the corresponding results of displacement and stress. Comparative analysis shows that the muscles in the upright position is subject to greater train vibration, and the vibration should not be controlled; under the lying position, the vibration response is similar to that at rest, but the amplitude and period slightly decrease. The results provide a reference for choosing a reasonable posture to achieve a better therapeutic effect.
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