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在文[1]至[6]中我们对埋地“Γ”管道的热胀强度问题已进行过较为详细的研究,并在实验中取得一定的验证。本文在此基础上提出分割计算法,用以解决埋地热输管道全线热胀强度问题。按照埋地管道热胀变形的特点,一般情况下全程具有n个弯头的埋地长输管道总可以分割成为n个“Γ”形管道进行计算。分割点的位置用迭代法确定,其零次近似位置可按过渡段长度的比例关系给出,收敛较快。
In [1] to [6], we have carried out a more detailed study on the thermal expansion strength of the buried “Γ” pipe and obtained some verification in the experiment. Based on this, the paper proposes a segmentation calculation method to solve the problem of thermal expansion strength across the board in buried heat pipelines. According to the characteristics of the thermal deformation of the buried pipe, under normal circumstances, the long-distance buried pipe with n elbows can always be divided into n “Γ” shaped pipes for calculation. The position of the split point is determined by iterative method. The zero-order approximate position can be given according to the ratio of the length of the transition segment, which converges quickly.