Kang W, Pilkey W D
Department of Mechanical, Aerospace, and Nuclear Engineering, University of Virginia, Charlottesville 22903, USA.
J Rehabil Res Dev. 1998 Jan;35(1):73-84.
A nonlinear multirigid body dynamic computer model has been developed to simulate the dynamic responses of a wheelchair-occupant system in a vehicle during a crash. The occupant, restrained by safety belts, is seated in a wheelchair that is, in turn, tied down in a vehicle. Validated extensively by crash sled tests at three laboratories, this model has been used to predict the responses of wheelchair-occupant systems in various crash environments. To evaluate the crashworthiness of different wheelchair tie-downs, the sensitivity of several design parameters, such as tiedown stiffness, wheel stiffness, and tiedown positions, has been studied using this model, and optimal values of these parameters for the wheelchair-occupant system have been obtained. Moreover, the model has been used to study the sensitivity of crash sled test pulse corridors in an effort to develop a sled test standard. It has been found that an existing ISO corridor allows large variation and should be "tightened." The model was implemented using a version of the multibody dynamic simulator, the Articulated Total Body program.
已开发出一种非线性多刚体动力学计算机模型，用于模拟车辆碰撞过程中轮椅乘坐者系统的动态响应。乘坐者系着安全带，坐在轮椅上，而轮椅又固定在车辆中。该模型在三个实验室通过碰撞滑车试验进行了广泛验证，已被用于预测不同碰撞环境下轮椅乘坐者系统的响应。为评估不同轮椅固定装置的防撞性能，使用该模型研究了几个设计参数的敏感性，如固定刚度、车轮刚度和固定位置，并获得了这些参数对于轮椅乘坐者系统的最佳值。此外，该模型已被用于研究碰撞滑车试验脉冲走廊的敏感性，以努力制定滑车试验标准。已发现现有的国际标准化组织走廊允许有较大变化，应予以“收紧”。该模型是使用多体动力学模拟器的一个版本——铰接全身程序实现的。
