Chwalik-Pilszyk Gabriela, Cirkl David, Kozien Marek S
Faculty of Mechanical Engineering, Cracow University of Technology, 31864 Cracow, Poland.
Faculty of Mechanical Engineering, Technical University of Liberec, 46117 Liberec, Czech Republic.
Materials (Basel). 2025 Mar 14;18(6):1280. doi: 10.3390/ma18061280.
In this article, an attempt was made to model the body of a person moving in a passive manner (movement forced by another person) in a wheelchair. For this purpose, the Wan-Schimmels model was modified by 4 DOF, supplementing it with the weight of the wheelchair and a polyurethane cushion. The study was designed to test the effectiveness of utilizing a polyurethane cushion to reduce the whole-body vibration acting on a person while moving in a wheelchair. The study used a rheological model of polyurethane (PU) foam with concentrated parameters. Harmonic and random vibration analysis was carried out for this model. At the same time, the model with 5 DOF seems to be sufficient to describe vibrations transmitted to wheelchair users. The model presented in this paper can become a tool for future analysis of vibrations of people of different weights, moving passively on various types of wheelchairs on surfaces whose irregularities can be given by an appropriate form of kinematic excitation. The approach used in this study is likely to be useful in selecting a wheelchair and seat cushion so as to counteract and minimize vibrations perceived by humans.
在本文中，有人尝试对在轮椅上以被动方式（由他人推动的运动）移动的人体进行建模。为此，对万 - 希默尔斯模型进行了4个自由度的修改，将轮椅和聚氨酯坐垫的重量补充到该模型中。该研究旨在测试使用聚氨酯坐垫来减少在轮椅上移动时作用在人体上的全身振动的有效性。该研究使用了具有集中参数的聚氨酯（PU）泡沫流变模型。对该模型进行了谐波和随机振动分析。同时，具有5个自由度的模型似乎足以描述传递给轮椅使用者的振动。本文提出的模型可以成为未来分析不同体重的人在各种类型轮椅上被动移动时的振动的工具，这些轮椅在表面上的不规则性可以通过适当形式的运动激励来给出。本研究中使用的方法可能有助于选择轮椅和座垫，以抵消并最小化人体感知到的振动。
