Stress Distribution of the Power Section Cup of Pipeline Inspection Gauges by Finite Element Method
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 9, Issue 2
Abstract
The pipeline inspection gauges (PIGs) are often blocked in actual operation. As the PIG ran in the straight pipeline, elbow, and anomaly, the large deformation and stress state of the power section cup were analyzed by a three-dimensional (3D) finite element (FE) simulation to provide a basis for solving the blockage problems. A rubber cylinder model was first established to simulate the interference fit to the pipeline. Numerical and analytical results were compared to verify the accuracy of the numerical method. Based on this method, the power section model with four cups was established and the contact-pair algorithm was adopted in order to simulate PIGs running in different locations of the pipeline. The radial stress and strain were subsequently obtained. Results show that when the PIG runs in a straight pipeline the radial stress of the outer edge of the cup is evenly distributed, and when the PIG runs in the elbow and anomaly the radial stress of the outer edge of the cup indicates a cardioid distribution.
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Acknowledgments
This work has been supported by the National Natural Science Foundation of China (Contract No. 11472309), the National Key Research Projects of China (Contract Nos. 2016YFC0802306 and 2016YFC0802100), the Key Research Projects of Shandong Province (Contract No. 2015GSF115024) and the Fundamental Research Funds for the Central Universities (Contract No. 14CX02208A).
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 9 • Issue 2 • May 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Aug 2, 2016
Accepted: Sep 1, 2017
Published online: Dec 29, 2017
Published in print: May 1, 2018
Discussion open until: May 29, 2018
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