儿童的惯性－惯量特征及其生长

CHILDRENS INERTIAL PROPERTIES AND THEIR GROWTH

本文应用排水法得到儿童肢体沿长轴的体积分布函数。根据关于人类肢体体积－质量的假定，肢体的质心、转动惯量及旋转半径等动力学常数可由前述的体积分布函数中求出。本文结果显示，部分力学参数与儿童的生长有着密切的联系，并受到性别的影响。因此，这些参数可以用来作为儿童的生长指标。以往数据的离散性表明，无论从系统上或技术上，这一领域都有许多工作要做。

Water displacement method has been used to obtain the volume distribution functions ofchildren's limb segments, on a sample of British children aged from 8 to 16. Based on the volume distribution data and certain hypothesis about the relation of volume and mass, the inertialcharaCteristics, induding the POsition of centre of gravity, the moment of inertia, and the radiusof gyration, have been calculated. The data obtained were compared with the Previous ones andtheir signincance in groWth studies were discussed. The author believes that besides theirbiomechanical background, these inertial characteristics have also their POtential al growth indications.