论文部分内容阅读
《油气储运》第6卷第2期刊载了梁政、袁祥忠的“埋地长输管道水平弯头升温载荷下的计算问题”,第 6卷第 5期又刊载了张怀法关于该文的“商榷(一)”,以及史永成、崔东植关于该文的“商榷(二)”。读完文章后提出下面几点认识: 1.文[1]试图应用纵横弯曲弹性地基梁理论来提高水平弯头升温载荷下的内力计算精度,这是有意义的工作。但由于数理分析方面有一系列误差,未能取得正确结果。这些差误中最主要的是:不考虑轴向力本身所构成的轴向应变,而只考虑横向弯曲所构成的轴向应变,主次关系处理方面欠妥当。这些差误中最明显的是该文图8,以正
Volume 6, Issue 2, “Oil & Gas Storage and Transportation”, published Liang Zheng and Yuan Xiangzhong’s “Calculation Problems Under Elevated Heating Beams for Buried Long-distance Pipelines,” Volume 6, Issue 5, “Discuss (a)”, and Shi Yongcheng, Cui Dongzhi on the article “deliberation (two).” After reading the article made the following understanding: 1. Text [1] attempting to use vertical and horizontal bending elastic foundation beam theory to improve the horizontal elbow heating load under internal force calculation accuracy, this is a meaningful work. However, due to a series of errors in mathematical analysis, it failed to achieve the correct result. The most important of these errors are: not considering the axial strain caused by the axial force itself but only considering the axial strain caused by transverse bending, the primary and secondary relationship processing is not proper. The most obvious of these errors is the Figure 8, positive