Way of determining the spatial distribution of stresses along the main pipeline section using ultrasonic method

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Authors:

М.М. Semegen, Candidate of Technical Sciences, Ivano-Frankivsk National Technical University of Oil and Gas, Senior Lecturer of the Department of Engineering and Computer Graphics, Ivano-Frankivsk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., orcid.org/0000-0003-2591-5250

I.P. Taras, Candidate of Technical Sciences, Associate Professor, Ivano-Frankivsk National Technical University of Oil and Gas, Senior Lecturer of the Department of Engineering and Computer Graphics, Ivano-Frankivsk, Ukraine, orcid.org/0000-0002-9865-0778

Abstract:

Purpose. Determination of the stress state and visualization of spatial stress distribution along the main pipeline section under operating conditions, which will make it possible to advise on the way for pipeline repair and recovery with provision of the structural integrity.

Methodology. Mathematical model for determining the main pipeline stress-strain state, which relates the stress value at a control point to speed variation of ultrasonic waves propagating in mutually perpendicular directions, was described on the basis of the acoustoelasticity laws and acoustic theory. Stress spatial distribution was modeled on a pipeline section using the computer algebra system.

Findings. The choice of approach to the spatial representation of the pipeline stress state was justified; basic steps and mathematical relationships to determine the stress state of the pipeline section were described. The results obtained were confirmed in practice. Their interpolation and visualization as continuous surface allows simulating the stress state between the control points on the pipeline surface.

Originality. The way of determining the data of the stress-strain state of main pipelines, their processing, visualization and adequate interpretation of the situation in terms of repairs was developed.

Practical value. The algorithm of pipeline wall stress determining along three mutually perpendicular directions is presented. The method of visualization of the spatial stress distribution both along the normal pipeline crossing and the main pipeline section was proposed, which allows non-destructive testing results to be used under operating conditions. This is especially important for dangerous sections of gas pipelines and pipeline systems, whose failure can result in environmental pollution and accidents with drastic consequences.

References.

1. Poberezhnyi, L., Stanetskyi, A. and Rudko, V., 2011. Corrosive monitoring of transit gas pipelines. Visnyk TNTU, 16(3), pp. 20‒26.

2. Paton, B. E., Troitskii, V. A. and Bondarenko, A. Y., 2008. Method for low-frequency ultrasonic control of extended objects by directed waves. Tekhnycheskaia dyahnostyka y nerazrushaiushchyi control, 2, pp. 20‒30.

3. Shlapak, L. S., 2014. Ultrasonic measuring mechanical stress. Truboprovidnyi transport, 3(87), pp. 10‒13.

4. Liutak, I. Z. and Kisil, I. S., 2010. Ultrasonic control parameters of the technical state of pipelines. Ivano-Frankivsk: IFNTUNH.

5. Liutak, I. Z., Liutak, Z. P. and Striletskyi, Yu. I., 2015. Improvement of the method of control of walls of pipelines by ultrasonic method with the use of information software. Metody ta prylady kontroliu yakosti, 2, pp. 27 ‒37.

6. Mandra, A. A., Lyutak, I. Z. and Lyutak, Z. P., 2014. Modeling of ultrasonic guided waves propagation in a waveguide with cross-section of finite size. Journal Of Hydrocarbon Power Engineering, 1(1), pp. 58–65.

7. Oryniak, I. V., Bohdan, A. V. and Lokhman, I. V., 2014. Defining the geometry of the center line of the main gas pipeline. Truboprovidnyi transport, 3(87), pp. 24‒27.

8. Semegen, M. M., Liutak, Z. P. and Kostiv, B. V., 2012. Improvement of the acoustic control method to determine the redistribution of stresses on the pipeline section. Visnyk Khmelnytskoho Natsionalnoho Universytetu, 4(191), pp. 22‒26.

9. Sydorenko, Yu. V. and Satskova, A. V., 2003. Computer realization of various ways of parametrizating Gaussian interpolation function. Applied geometry and engineering graphics, 72, pp. 174‒178.

10. Taras, I. P. and Pavlyk, I. V., 2010. Visualization of physical objects and processes by creating interpolation geometric patterns. Rozvidka ta rozrobka naftovykh i hazovykh rodovyshch, 2(35), pp. 83‒88.

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ISSN (print) 2071-2227,
ISSN (online) 2223-2362.
Journal was registered by Ministry of Justice of Ukraine.
Registration number КВ No.17742-6592PR dated April 27, 2011.

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