Bertocci G E, Esteireiro J, Cooper R A, Young T M, Thomas C
Department of Rehabilitation Science and Technology, University of Pittsburgh, PA 15260, USA.
J Rehabil Res Dev. 1999 Jan;36(1):32-41.
Wheelchair designs based upon loads applied quasi-statically during normal mobility use are apt to be inadequate to handle the increased level of dynamic crash forces that may be encountered when using the wheelchair as a motor vehicle seat. The purpose of this study was to characterize the integrity of wheelchair caster assemblies under simulated crash conditions. This study utilized dynamic drop (DD) testing, with loading levels and rates adjusted to match those found previously in sled impact testing and computer crash simulations. The results verify that current caster assembly designs may not be able to withstand forces associated with a crash. Five of seven evaluated caster assemblies failed when loaded to 8,007 N, or less, at loading rates seen in sled testing. DD testing used in this study is a valuable tool that can be used in the design of transport wheelchair components.
基于正常移动使用时准静态施加负载的轮椅设计，在将轮椅用作机动车座椅时，可能不足以应对可能遇到的增加的动态碰撞力。本研究的目的是表征轮椅脚轮组件在模拟碰撞条件下的完整性。本研究采用动态跌落（DD）测试，调整加载水平和速率以匹配先前在雪橇撞击测试和计算机碰撞模拟中发现的水平。结果证实，当前的脚轮组件设计可能无法承受与碰撞相关的力。在雪橇测试中看到的加载速率下，七个评估的脚轮组件中有五个在加载到8007 N或更低时失效。本研究中使用的DD测试是一种有价值的工具，可用于运输轮椅部件的设计。
