Investigation of the relationship between the Lamb waves phase velocity and the technical condition of housing and utilities pipelines

A.a Ibadov ,D.A Makueva,А Е Кондратьев ,D.v Sergeeva

doi:10.1051/e3sconf/202021601080

Abstract

The article describes a method for determining the dependence of the Lamb waves phase velocity on the technical condition of housing and utilities pipelines, using the example of thin two-layer segments. Variations in the thickness of the considered pipeline affect the propagation parameters of the Lamb wave mode.

Highlights

During long-term operation, pipelines are exposed to internal and external influences
The waves propagation speed CL depends on the segment thickness, the elastic properties of the material and the wave frequency ω
We come to the conclusion that for a segment thickness d, the propagation speed of the fastest symmetric mode S0 can be written as: CS0= {E/[ρ(1-א 2)]}1/2 (7)

Summary

Introduction

During long-term operation, pipelines are exposed to internal and external influences. It is very effective to use metallic and non-metallic coatings to ensure the wear resistance and durability of steel objects of thermal power plants. This requires determining and evaluating the quality and area of adhesion of materials to the base. Monitoring by non-destructive testing methods remains relevant to solve such problems. This helps to reduce the occurrence of undesirable consequences from the degradation of pipeline materials developing over time. It is proposed to consider a new approach to determine the technical condition of pipelines for housing and utilities It is based on the propagation of Lamb waves in the considered segments

Lamb waves propagation in a segment

Theoretical analysis

Conclusion