Fluid flow analysis of gas flow in oil and gas pipeline

摘要

This research project is focused on the fluid flow analysis of gas flow in oil and gas pipeline. Flow inside pipeline can cause vibration to the pipeline structure. The objective of this project is to analyze gas flow in oil and gas transmission pipeline by using FEA (Finite Element Analysis). In order to analyze the gas flow a rig has to be made and then do the modal analysis and operational deflection shape analysis (ODS) will be conducted. Modal analysis is done by attaching an accelerometer at different place of the rig and then knocks the rig by using impact hammer to simulate external forces. The data are analyze by using the MEscope software. The result is then compared with the result obtained from the Ansys software. After that the ODS analysis is done by conducting the experiment when there is flow inside the pipe. The modal analysis will show the result when there are external force acting on the rig and ODS analysis will show the result of the rig under operating condition. The result will show the mode shape of the rig, the natural frequencies and the damping of the rig. From the result we can see that in each of the mode shape that the rig has it will have its own natural frequency. The result of ODS will show the mode shape, natural frequency and the damping of the rig under operating condition. The data are compared with the simulation is because in real world the oil and gas pipeline are buried underground, so experiment cannot be done. By comparing these two results we can obtain the error of the result obtained from the simulation.