scholarly journals Response of buried oil and gas pipelines subjected to reverse faulting: A novel centrifuge-finite element approach

2017 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Reza Yeganeh Khaksar ◽  
Majid Moradi ◽  
Abbas Ghalandarzadeh
Keyword(s):  
Finite Element ◽  
Oil And Gas ◽  
Gas Pipelines ◽  
Finite Element Approach ◽  
Oil And Gas Pipelines ◽  
Reverse Faulting ◽  
Element Approach

Full Scale Blasting Test and Finite Element Analysis of Nozzle Repair Pipeline

2017 ◽  
Author(s):  
Xu Wu ◽  
Jian Shuai
Keyword(s):  
Finite Element ◽  
Wall Thickness ◽  
Oil And Gas ◽  
Axial Strain ◽  
Element Model ◽  
Nozzle Diameter ◽  
Gas Pipelines ◽  
Axial Deformation ◽  
Element Analysis ◽  
Oil And Gas Pipelines

Nozzle repair is one of the common repair methods for oil and gas pipelines. As a means to test the applicability of the pipeline, the pressure test is widely used in the integrity evaluation of oil and gas pipelines. To avoid possible failure accidents of nozzle repair pipeline, hydrostatic burst tests were performed. The finite element model of the pipeline was established. The effects of nozzle diameter and nozzle wall thickness parameters on the stress-strain response of the nozzle repair pipeline were discussed. The results show that the yield stress of the specimen is about 11.2MPa, and the blasting pressure is 12.9MPa. Due to the effect of nozzle structure, the change of strain for each point with the internal pressure is inconsistent. The ratio of axial strain to circumferential strain decreases with the increase of pressure, which shows that the yield mainly occurs in the hoop direction, and the axial deformation increases with the increase of the pressure. Under the condition of the_constant wall thickness, the stress distribution of pipeline is uniform and the yield pressure increases with the decrease of nozzle diameter. The smaller the nozzle diameter, the better the bearing capacity. The selection for the wall thickness of nozzle should be greater than or equal to the thickness of the pipe wall.

A Finite Element Approach to the Transient Dynamics of Rolling Tires with Emphasis on Rolling Noise Simulation4

2007 ◽  
Vol 35 (3) ◽  
pp. 165-182 ◽  
Author(s):  
Maik Brinkmeier ◽  
Udo Nackenhorst ◽  
Heiner Volk
Keyword(s):  
Finite Element ◽  
Traffic Noise ◽  
Complex Eigenvalue ◽  
Arbitrary Lagrangian Eulerian ◽  
Finite Element Approach ◽  
Road Systems ◽  
Element Approach ◽  
Road Surface Roughness ◽  
Complex Eigenvalue Analysis ◽  
Rolling Noise

Abstract The sound radiating from rolling tires is the most important source of traffic noise in urban regions. In this contribution a detailed finite element approach for the dynamics of tire/road systems is presented with emphasis on rolling noise prediction. The analysis is split into sequential steps, namely, the nonlinear analysis of the stationary rolling problem within an arbitrary Lagrangian Eulerian framework, and a subsequent analysis of the transient dynamic response due to the excitation caused by road surface roughness. Here, a modal superposition approach is employed using complex eigenvalue analysis. Finally, the sound radiation analysis of the rolling tire/road system is performed.

Sign in / Sign up

Export Citation Format

Share Document