Analysis of Pipe Vibration

Lau, Jun Yong (2017) Analysis of Pipe Vibration. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

Excessive pipe vibration is one of causes of leakage and pipe fatigue failure. The vibration caused piping system lifespan shorten and reduces pressure of working fluid, which eventually increases cost of maintenance. The vibration of PVC pipe was analysed through intensively and pipe geometry modification was done to suppress the vibration. First, modal analysis was carried out using LMS SCADA Mobile wit LMS Test Lab acquisition system to identify PVC pipe’s natural frequencies and mode shapes. Then, pipe’s operating frequency was measured at various flow rates at the range of 3 Gpm to 11 Gpm. After parametric study, PVC pipe modified by adding mass on the antinode of vibration mode to avoid resonance and can be suppressed. The result were predicted in LMS Test Lab Modification Prediction tool and it was implemented on the PVC pipe. Result show that the vibration of modified pipe has been reduced up to 71.58% with average reduction of 53.73% at the various flow rate with range of 3 Gpm to 11 Gpm.