kaz29Вестник Казахстанско-Британского технического университетаHerald of the Kazakh-British Technical University1998-66882959-8109Казахстанско-Британский Технический Университет10.55452/1998-6688-2024-21-2-238-254kaz29-1270Research ArticleФИЗИЧЕСКИЕ НАУКИPHYSICAL SCIENCESГАЗОДИНАМИЧЕСКИЕ ПРОЦЕССЫ, ПРОИСХОДЯЩИЕ ПРИ РАЗРУШЕНИИ ГАЗОПРОВОДОВ, И МЕТОДЫ ИХ АНАЛИЗАGAS-DYNAMIC PROCESSES OCCURRING DURING THE DESTRUCTION OF GAS PIPELINES AND METHODS OF THEIR ANALYSIShttps://orcid.org/0000-0002-8153-1449ЖаңабайН. Ж.ZhangabayN. Zh.

канд. техн. наук

160012, г. Шымкент

candidate of technical sciences

160012, Shymkent

nurlan.zhanabay777@mail.ruИбраимоваҰ. Б.IbraimovaU. B.

магистр, докторант

160012, г. Шымкент

Master, Doctoral Student

160012, Shymkent

ibraimova_uljan@mail.ruhttps://orcid.org/0000-0001-7798-1044СулейменовУ. С.SuleimenovU. S.

канд. техн. наук

160012, г. Шымкент

doctor of technical sciences

160012, Shymkent

ulanbator@inbox.ruhttps://orcid.org/0000-0003-2005-3305БугановаС. Н.BuganovaS. H.

канд. техн. наук

050043, г. Алматы

candidate of technical sciences

050043, Almaty

Svetlanabuganova7@gmail.comhttps://orcid.org/0000-0002-4771-9835УтелбаеваА. Б.UtelbayevaA. B.

д-р. хим. наук

160012, г. Шымкент

doctor of Chemical Sciences

160012, Shymkent

mako_01-777@mail.ruЮжно-Казахстанский исследовательский университет им. М. АуэзоваКазахстанAuezov UniversityKazakhstanМеждународная образовательная корпорация (КазГАСА)КазахстанInternational Educational CorporationKazakhstan202402072024212238254Copyright © Жаңабай Н.Ж., Ибраимова Ұ.Б., Сулейменов У.С., Буганова С.Н., Утелбаева А.Б., 20242024Жаңабай Н.Ж., Ибраимова Ұ.Б., Сулейменов У.С., Буганова С.Н., Утелбаева А.Б.Zhangabay N.Z., Ibraimova U.B., Suleimenov U.S., Buganova S.H., Utelbayeva A.B.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik.kbtu.edu.kz/jour/article/view/1270

Рассматривается процесс динамического разрушения типового участка стального магистрального газопровода с трещиной под действием газодинамического давления. Исследуется высокоскоростное развитие трещины, которая растет под действием истекающего большого количества газа под высоким давлением. Моделируется процесс движения магистральной трещины, которое индуцируется движением газа. Математическая модель этого процесса включает модель газодинамических процессов в трубе и модель высокоскоростного деформирования и разрушения участка трубы с трещиной. Предложена приближенная аналитическая модель газодинамических процессов, которая позволяет моделировать динамическое убывание давления на внутреннюю поверхность трубы и берега трещины. Динамическое изменение давления базируется на декомпрессии газа в локализованной части трубы в окрестности трещины. Модель учитывает изменение давления газа в трубопроводе вдоль продольной координаты части трубы с трещиной. Рассмотрена численная процедура для расчета газодинамического давления при истечении газа через трещину. Она позволяет определять давление на берега трещины как функцию времени. Результаты этой численной процедуры используются для численного моделирования высокоскоростного деформирования и лавинного разрушения типового участка магистрального газопровода с трещиной. Предложена аналитическая модель, которая использует методы механики разрушения для предсказания критического давления, при котором наблюдается рост трещины в трубе. Модель верифицирована по экспериментальным данным и служит для быстрой оценки целостности трубы. Этот аналитический подход используется для предсказания возможности разрушения трубы на основе свойств материала, геометрии трещины и размеров трубы. Он может использоваться для предварительных оценочных расчетов. Рассмотрен численно-аналитический метод для анализа неупругого динамического разрушения трубы. Он основывается на анализе величины угла раскрытия вершины трещины. Также рассмотрен численный метод анализа напряженного состояния в области трещины, учитывающий пластическое деформирование. Представленные модели позволяют численными методами исследовать динамику развития трещин и, как следствие, разрушение типовых участков магистральных газопроводов под давлением. Использование результатов этих исследований позволит принять превентивные меры для предотвращения случаев лавинного разрушения аварийных участков магистральных трубопроводов.

The process of dynamic destruction of a typical section of a steel main gas pipeline with a crack under the action of gas dynamic pressure is considered. The high-speed development of a crack, which grows under the action of a large amount of gas flowing out under high pressure, is investigated. The process of the main crack movement, which is induced by the gas movement, is modeled. The mathematical model of this process includes a model of gas-dynamic processes in a pipe and a model of high-speed deformation and fracture of a pipe section with a crack. An approximate analytical model of gas-dynamic processes is proposed, which makes it possible to simulate the dynamic decrease in pressure on the inner surface of the pipe and the crack bank. The dynamic pressure change is based on decompression of gas in the localized part of the pipe in the vicinity of the crack. The model takes into account the change in gas pressure in the pipeline along the longitudinal coordinate of the part of the pipe with a crack. A numerical procedure for calculating the gas dynamic pressure when gas flows through a crack is considered. It allows you to determine the pressure on the crack banks as a function of time. The results of this numerical procedure are used for numerical simulation of high-speed deformation and avalanche destruction of a typical section of a main gas pipeline with a crack. An analytical model is proposed that uses the methods of fracture mechanics to predict the critical pressure at which crack growth in the pipe is observed. The model is verified according to experimental data and serves for a quick assessment of the integrity of the pipe. This analytical approach is used to predict the possibility of pipe failure based on material properties, crack geometry and pipe dimensions. It can be used for preliminary estimation calculations. A numerical-analytical method for the analysis of inelastic dynamic destruction of a pipe is considered. It is based on the analysis of the magnitude of the crack tip opening angle. A numerical method for analyzing the stress state in the crack region, taking into account plastic deformation, is also considered. The presented models allow numerical methods to investigate the dynamics of crack development and, as a consequence, the destruction of typical sections of main gas pipelines under pressure. Using the results of these studies will make it possible to take preventive measures to prevent cases of avalanche destruction of emergency sections of main pipelines.

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The authors declare that there are no conflicts of interest present.