CAJ | 학술논문

对不同材料杆组成的均质三角形边框，利用离散质点系统的质心公式确定均质三角形边框的质心位置，并推导三角形边框绕质心轴的转动惯量公式。根据刚体对过质心轴的力矩平衡条件，给出了三角形边框质心的作图方法。已有文献的公式为本文结果的一个特例，所用方法可进一步推广到求解其他边框图形绕质心轴的转动惯量。
대불동재료간조성적균질삼각형변광，이용리산질점계통적질심공식학정균질삼각형변광적질심위치，병추도삼각형변광요질심축적전동관량공식。근거강체대과질심축적력구평형조건，급출료삼각형변광질심적작도방법。이유문헌적공식위본문결과적일개특례，소용방법가진일보추엄도구해기타변광도형요질심축적전동관량。
By using the centroid formula of system of particles,the centroid of a homogeneous triangu-lar frame made of several materials is determined.The rotational inertia of a homogeneous triangular frame a-round its centroidal axis is derived.Based on the moment equilibrium condition around its centroidal axis of the rigid body,the drawing method about the centroid of the triangular frame is given.Some previous results become special cases of this paper and the method in use can be extended to cases of other grid-like rigid body.