Abstract
Pipelines have been acknowledged as the most reliable, economic and efficient means for the transportation of gas and other commercial fluids such as oil and water. The designation of pipeline system as “lifelines” signifies that their operation is essential in maintaining the public safety and well being. A pipeline transmission system is a linear system which traverses a large geographical area, and soil conditions thus, is susceptible to a wide variety of hazards. This pa-per is concerned with the dynamic behavior of buried town gas pipelines. A computer model with a finite number of nodes is created to simulate the behavior of the real gas pipeline. The dynamic susceptibility method is applied for twenty mode shapes of this model, which utilizes the stress per velocity method and is an incisive analytical tool for screening the vibration modes of the system. It can be readily identified, which modes, if excited, could potentially cause large dynamic stresses. This paper discusses also two of the piping dynamic analyses, namely the effect of the response spectrum of an earthquake and the time history analysis of a truck crosses the pipeline.
Highlights
Introduction & Literature ReviewGas distribution systems are one of six broad categories of infrastructure grouped under the heading “lifelines”
The results showed seism had big effect on the performance of the pipeline system, which should be considered when pipeline design was made
Two types of vibration excitation are considered in this work, namely the influence of an earthquake through its response spectrum and the time history analysis of a truck, which crosses the gas pipeline
Summary
Gas distribution systems are one of six broad categories of infrastructure grouped under the heading “lifelines”. [9] simplified the underground pipeline in liquefied soil under the action of seismic loading as a model of a simple beam with elastic supports on two ends and considering the interaction of buried pipelinesoil and fluid-structures, the authors use the mode superposition method to analyze the dynamic seismic response. The dynamic floating displacement of pipeline and how it varies with the parameters of flow velocity, fluid pressure, fluid density, axial force of pipe section, damping of pipe material, the specific gravity and relative elastic coefficient of liquefied soil and the amplitude of seismic acceleration was calculated and analyzed. The method provides a quick and incisive support to efforts of observation, measurement, assessment, diagnosis, and correction It reveals which features of the system layout and support are responsible for the susceptibility to large dynamic stresses. Two types of vibration excitation are considered in this work, namely the influence of an earthquake through its response spectrum and the time history analysis of a truck, which crosses the gas pipeline
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
