Numerical simulation of the characteristics of the oscillations of a straight tube to verify the integrity of the results of the flowmeter

Abstract

The article is devoted to the issues of integrity and availability of information received from
sensors controlling the flow of fluid. A numerical method was proposed for determining oscillations of a straight-line portion of a sensor tube exposed to an external pulse effect and rigidly
fixed at both ends. The mathematical model of the oscillation tube sensor, taking into account
the flow of fluid inside the tube, is presented in the form of a fourth-order partial differential
equation with given initial and boundary conditions. The computational experiments on the
oscillations of the tube elements were carried out to determine the necessary characteristics of
the oscillations. The amplitudes of oscillations, the phase difference of the direct element of the
tube are determined. According to the results of the proposed method, the required characteristics of tube oscillations are determined, which allows to check the accuracy of measurements
obtained during the operation of the sensor.