發(fā)布時間：2018-03-28 04:00

  本文選題：埋藏光面管　切入點：抗外壓穩(wěn)定　出處：《廣西大學學報(自然科學版)》2017年04期

【摘要】：針對阿姆斯圖茲法(阿氏法)失穩(wěn)機理和控制微分方程不系統、各國規(guī)范采用的迭代公式和工程應用不統一的問題,本文系統推導阿氏法單波失穩(wěn)機理的控制微分方程組,對比論證了單波失穩(wěn)機理的可靠性;給出臨界外壓迭代計算公式的推導假定,剖析了目前常用的4種迭代公式的異同;研究簡化臨界外壓迭代公式選取、縫隙計算與取值、安全系數取值對對抗外壓設計方案的影響;指出阿氏論文以及美國ASCE、美國EM引用阿氏公式中的有誤處。工程實例分析表明:我國埋藏光面管抗外壓設計安全儲備相對偏大,建議采用阿氏法臨界外壓迭代公式和1.5的抗外壓安全系數,使安全儲備與國際標準基本一致,以適應管道技術進步現狀和國際競爭力要求。
[Abstract]:In order to solve the problems of instability mechanism and governing differential equation of Amisturtz method, the iterative formula adopted in different countries and the engineering application, the control differential equations of single wave instability mechanism of Armstadze method are deduced systematically. The reliability of the single wave instability mechanism is compared and proved, the derivation assumption of the iteration formula of critical external pressure is given, the similarities and differences of four kinds of iterative formulas are analyzed, and the selection of the iterative formula of critical external pressure, the calculation of slot and the value of the simplified iteration formula of critical external pressure are studied. The influence of safety factor on the design scheme of resisting external pressure, and pointing out that there are some errors in Archer's formula cited in Archer's paper and ASCE and EM in America. The analysis of engineering example shows that the safety reserve of buried smooth tube in the design of resisting external pressure is relatively large in our country. It is suggested that the iterative formula of critical external pressure of Archer method and the safety factor of 1.5 for resisting external pressure should be adopted to make the safety reserve basically consistent with the international standard, so as to meet the requirements of pipeline technology progress and international competitiveness.
【作者單位】： 廣西大學土木建筑工程學院;廣西防災減災與工程安全重點實驗室;武漢大學水資源與水電工程科學國家重點實驗室;
【基金】：國家自然科學基金資助項目(51469004)
【分類號】：TV732.41
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本文編號：1674635