Construction of human body vibration finite element model that simulates riding comfort of persons who ride a wheelchair

模拟轮椅乘坐舒适度的人体振动有限元模型构建

基本信息

批准号：
11832004
负责人：
AOKI Hiroyuki
金额：
$ 2.62万
依托单位：
Chiba University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11832004/
关键词：
Wheel Chair Riding Comfort Human Vibration Finite Element Method Simulation 3D model Vibration Mode Multiple-regression 有限要素座姿勢垂直加振

项目摘要

The purpose of this study was to investigate the possibility of comfort improvement of persons who ride wheelchairs carried in welfare vehicles. Firstly, an interview with wheelchair users who daily use welfare vehicles was carried out to investigate the present situation. A boarding experiment to the wheelchair in the real welfare vehicle was also carried out. From not only physical viewpoint but also psychological viewpoint, evaluation methods for quantitatively evaluating vibration characteristic of this wheelchair-human vibration system were examined. Secondly, another wheelchair board experiment by sheet excitation equipment that reproduced vibration environment was carried out. In the experiment, the transmissibility of human body who rode the wheelchair, the evaluation of sense of vibration at each body part and the riding comfort evaluation were evaluated. As a result, it was confirmed that swinging of head, thorax top and bottom greatly influence the riding comfort, though the vibration behavior tendencies of the each every examinee were different each other. In particular, it became clear that head vertical vibration at 4Hz and head at 5Hz and vertical vibration of the bust gave most adverse effect for the riding comfort. In this paper, it has been concluded that the change of the vibration mode as well as the decrease of magnitude of the vibration could improve riding comfort. Based on the knowledge got here, a wheelchair-human vibration system model according to finite element method was constructed to examine the possibility of this riding comfort improvement. The simulation according to the vibration model showed that the change in not only the magnitude of the vibration of the human body but also the vibration mode could be reproduced only by changing the physical properties of seat cushions.

这项研究的目的是调查乘坐福利车辆骑轮椅的人舒适改善的可能性。首先，对每天使用福利车辆的轮椅使用者进行了采访，以调查当前情况。还进行了真正的福利车辆轮椅的登机实验。从物理观点和心理角度来看，研究了该轮椅 - 人类振动系统的定量评估振动特征的评估方法。其次，进行了另一个轮椅板通过板励磁设备进行了重现振动环境的实验。在实验中，评估了骑轮椅的人体的传播性，评估每个身体部位的振动感和骑行舒适性评估。结果，已经证实，尽管每个考生的振动行为趋势彼此不同，但胸部顶部和底部的摇摆会极大地影响骑行的舒适感。特别是，很明显，在4Hz处的头部垂直振动和5Hz的头部，胸围的垂直振动对骑行舒适产生了最大的不利影响。在本文中，得出的结论是，振动模式的变化以及振动幅度的减小可以改善骑行舒适性。基于知识到达这里，根据有限元方法进行了轮椅 - 人类振动系统模型，以检查这种骑行舒适性的可能性。根据振动模型的仿真表明，不仅可以通过更改座垫的物理特性来重现人体振动的幅度的变化。