【摘要】 <正> 1983年在天山乌鲁木齐河源l号冰川人工冰洞内曾对冰内过程进行多项自的系统观测研究。其中,应力和应变的研究是在假定变形发生在一个主平面上和假定观测部分冰的变形为均匀变形这样两个前提下进行的。为了验证均匀变形假定的可靠性,1984年在原有观测断面上,专门作了非均匀变形的观测研究。结果表明,均匀变形假定的误差甚小,一般小于10％,可以广泛采用。这对于冰川动力学研究,无疑有重要贡献。更多还原

【Abstract】 In 1984 the circle for deformation observations was changed to be a dual circle with the same centre. Each circle can be divided into 16 parts. Assuming that the deformation of each part was a plane homogeneous finite deformation, we can obtain the deformation ellipse of each part. The features of the inhomogeneous deformation were examined by means of comparison and statistics of the deformation ellipse parameters of all parts. The result shows that in the inner of a glacier, where the strain rate is small, the inhomogeneous component of deformation is not too significant, except its margins where the shear strain is great. Therefore, the ice deformation can be calculated according to the assuption of the homogeneous deporma-tion, with an error allowable.更多还原