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实验已经证明,转子和叶片间的圆角,平板中的圆孔,圆环的内壁等的几何边界是可以通过移去某些材料而得到较理想的应力分布的。本文在实验上和理论上给出了优化圆管横截面的外壁形状的方法,这些结果是和地下输流管道密切相关的:①首先用光弹性实验方法对承受径向集中载荷和均布铅垂载荷的圆环的外壁轮廓进行了修正,得到了较理想的应力分布;②在理论上确定移去受压圆环的多余材料的位置的础基上,导出了等强度环的形状的理论公式。
Experiments have proved that the geometrical boundaries of the roundness between the rotor and the blade, the round hole in the flat plate, the inner wall of the ring, etc., can be obtained by removing some materials and obtaining a better stress distribution. In this paper, the method of optimizing the shape of the outer wall of the cross-section of the circular tube is given experimentally and theoretically. These results are closely related to the underground pipeline: 1 First, the photoelastic experimental method is used to bear the radial concentrated load and the lead is uniformly distributed. The contour of the outer wall of the vertical-loaded ring was modified to obtain a more ideal stress distribution. 2 Theoretically, the position of the redundant material removed from the pressed ring was determined, and the theory of the shape of the iso-intensity ring was derived. formula.