ANALYTICAL ESTIMATION OF FLOW INDUCED VIBRATION IN PIN-PIN SUPPORTED PIPLELINE AND ITS ASSESSMENT AS BASE EXCITATION SIGNAL FOR A POWER HARVESTER
Keywords:
Flow induced vibration, Pipeline, Pin-Pin Configuration, Power Harvesting, Piezo-electric generation, Fast Fourier Transform.Abstract
This work estimates analytically, the vibration induced in a simply supported pipeline with fluid flow,
and assesses the vibration for its adequacy as base excitation signal for power harvesting
transducer. The work is based on the model of the fourth order Partial and Ordinary Differential
Equations without its Coriolis component. The Algorithms for the analytical solution of the FIV
models are developed using the variable separation method, and lateral acceleration then simulated
using MATLAB. The Fast Fourier Transforms of the obtained vibrations (acceleration) at different
positions along the pipeline indicates that frequency and amplitude vary for different positions. For
a set of adopted pipeline parameters and at a fluid flow velocity of 2 m/s, the maximum frequency is
obtained at the centre of the pipe with amplitude of 10.64 m/s2 at frequency of 41Hz. The values fall
within the acceptable range of vibration that can be used for power harvesting applications.