RU2004120010A - METHOD FOR DETERMINING LOCAL SECTIONS OF MAIN PIPELINES WITH MAXIMUM DEFORMATION - Google Patents

METHOD FOR DETERMINING LOCAL SECTIONS OF MAIN PIPELINES WITH MAXIMUM DEFORMATION Download PDF

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RU2004120010A
RU2004120010A RU2004120010/28A RU2004120010A RU2004120010A RU 2004120010 A RU2004120010 A RU 2004120010A RU 2004120010/28 A RU2004120010/28 A RU 2004120010/28A RU 2004120010 A RU2004120010 A RU 2004120010A RU 2004120010 A RU2004120010 A RU 2004120010A
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Russia
Prior art keywords
projectile
pipe
acceleration
oscillations
determining
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RU2004120010/28A
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Russian (ru)
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RU2272248C1 (en
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Андрей Иванович Синев (RU)
Андрей Иванович Синев
Анатолий Павлович Рамзаев (RU)
Анатолий Павлович Рамзаев
Владимир Зиновьевич Макаров (RU)
Владимир Зиновьевич Макаров
Дмитрий Владимирович Черепанов (RU)
Дмитрий Владимирович Черепанов
Петр Григорьевич Чигирев (RU)
Петр Григорьевич Чигирев
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ЗАО "Газприборавтоматикасервис" (RU)
ЗАО "Газприборавтоматикасервис"
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Priority to RU2004120010/28A priority Critical patent/RU2272248C1/en
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Claims (3)

1. Способ определения локальных участков магистральных трубопроводов с максимальной деформацией с помощью внутритрубных инспектирующих снарядов, включающий определение с помощью бесплатформенной инерциальной системы ориентации и навигации трех компонентов вектора абсолютной угловой скорости и трех компонентов вектора кажущегося ускорения внутритрубного инспектирующегося снаряда, измерение давления газа на передней и задней стенках снаряда, определения с помощью одометра приращений его пути с записью в память бортового компьютера всего объема информации, при пропускании снаряда по участку трубопровода, отличающийся тем, что измеряют колебания трубы в районе камер запуска и приема, колебания снаряда при его неподвижном состоянии, определяют частоты и коэффициенты демпфирования затухающих колебаний ускорения снаряда и время переходного процесса при прохождении швов для выбора дистанции спектрального анализа, оценивают спектральные характеристики сигналов ускорения в вертикальном направлении снаряда между швами, исключают уровень амплитуд, равный шуму в виде колебаний трубы и снаряда при его неподвижном состоянии, а также пульсации давления газа; на дискретных частотах выявляют максимальные резонансные значения составляющих Фурье-разложения сигналов ускорения, обнаруживают частоты трех форм колебаний трубы на репрезентативных участках, определяют их положения на трассе магистрального газопровода и амплитуды колебаний по формуле1. A method for determining local sections of trunk pipelines with maximum deformation using in-tube inspection shells, comprising determining with the help of a strap-down inertial system of orientation and navigation the three components of the absolute angular velocity vector and three components of the apparent acceleration vector of the in-tube inspected projectile, measuring the gas pressure at the front and rear the walls of the projectile, determining with the odometer the increments of its path with recording in the memory of the onboard computer and the entire amount of information when passing a projectile along a portion of the pipeline, characterized in that the pipe oscillations are measured in the region of the launch and reception chambers, the projectile vibrations when it is stationary, the frequencies and damping coefficients of damped projectile acceleration oscillations and the transition process during the passage of the joints are determined for the choice of the distance of the spectral analysis, evaluate the spectral characteristics of the acceleration signals in the vertical direction of the projectile between the seams, exclude the level of amplitudes equal to the noise in the form pipe and projectile vibrations when it is stationary, as well as gas pressure pulsations; at discrete frequencies, the maximum resonance values of the components of the Fourier decomposition of the acceleration signals are detected, the frequencies of three pipe oscillation modes are detected in representative sections, their positions on the main gas pipeline route and the vibration amplitudes are determined by the formula
Figure 00000001
Figure 00000001
где
Figure 00000002
- величина ускорения в вертикальном направлении;
Where
Figure 00000002
- the magnitude of the acceleration in the vertical direction;
mc - масса снаряда;m c is the mass of the projectile; mT - масса отрезка трубы на двух опорах длиной l;m T is the mass of the pipe segment on two supports of length l;
Figure 00000003
Figure 00000003
ω - частота колебаний снаряда;ω is the oscillation frequency of the projectile;
Figure 00000004
Figure 00000004
kT - эквивалентная изгибная жесткость отрезка трубы;k T is the equivalent bending stiffness of the pipe section; Е - модуль упругости материала трубы;E is the elastic modulus of the pipe material; J - момент инерции трубы;J is the moment of inertia of the pipe; λm - коэффициент (22,4; 61,7; 121 для первой, второй и третьей формы колебаний соответственно);λ m - coefficient (22.4; 61.7; 121 for the first, second, and third modes of vibration, respectively);
Figure 00000005
- жесткость снаряда, определяемая по периоду затухающих колебаний Т после взаимодействия со швом.
Figure 00000005
- the stiffness of the projectile, determined by the period of damped oscillations T after interaction with the seam.
2. Способ по п.1, отличающийся тем, что положение репрезентативных участков выявляют по почвенным картам и углам наклона земной поверхности, привязанных к географическим координатам измеренных величин.2. The method according to claim 1, characterized in that the position of the representative plots is revealed by soil maps and the angles of inclination of the earth's surface, tied to the geographical coordinates of the measured values. 3. Способ по п.1, отличающийся тем, что положение репрезентативных участков выявляют по аэрокосмическим снимкам.3. The method according to claim 1, characterized in that the position of the representative areas is detected by aerospace images.
RU2004120010/28A 2004-06-30 2004-06-30 Method for determining local portions of main pipelines with maximal deformation RU2272248C1 (en)

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CN104203443B (en) * 2012-04-02 2016-03-16 杰富意钢铁株式会社 UOE steel pipe and structure
GB2545044B (en) * 2016-08-11 2018-02-07 Guided Ultrasonics Ltd Determining a thickness of a region of wall-or plate-like structure

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