埋藏光面管抗外压稳定分析的阿姆斯图兹法及其应用研究

发布时间：2018-03-28 04:00

  本文选题：埋藏光面管　切入点：抗外压稳定　出处：《广西大学学报(自然科学版)》2017年04期

【摘要】：针对阿姆斯图兹法(阿氏法)失稳机理和控制微分方程不系统、各国规范采用的迭代公式和工程应用不统一的问题,本文系统推导阿氏法单波失稳机理的控制微分方程组,对比论证了单波失稳机理的可靠性;给出临界外压迭代计算公式的推导假定,剖析了目前常用的4种迭代公式的异同;研究简化临界外压迭代公式选取、缝隙计算与取值、安全系数取值对对抗外压设计方案的影响;指出阿氏论文以及美国ASCE、美国EM引用阿氏公式中的有误处。工程实例分析表明:我国埋藏光面管抗外压设计安全储备相对偏大,建议采用阿氏法临界外压迭代公式和1.5的抗外压安全系数,使安全储备与国际标准基本一致,以适应管道技术进步现状和国际竞争力要求。
[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.
【作者单位】： 广西大学土木建筑工程学院;广西防灾减灾与工程安全重点实验室;武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家自然科学基金资助项目(51469004)
【分类号】：TV732.41
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本文编号：1674635