Ultrasonic Stress Measurement and Finite Element Analysis of Settlement Pipeline

Abstract

Due to the influence of geological factors, the settlements of pipelines occur in the service process. Local high stress positions of settlement pipelines have the phenomena of stress concentration, which threatens the safe operation of pipelines. How to measure and evaluate the stress state of settlement pipelines is an urgent problem to be solved for pipeline enterprises. Because the acoustic elastic effect of ultrasonic mainly depends on the stress in the material, the specific relationship between the acoustoelastic constant of ultrasonic and stress can be used to measure the pipeline stress. Taking the settlement pipeline in a gas storage station as an example, the axial stress of the pipeline is measured based on the ultrasonic longitudinal wave method, and the finite element model is established. The finite element analysis results are compared with the stress measurement results to determine the current settlement displacement and safety state of the pipeline.