THE SIMULATION OF ELASTIC WAVES MOTION ALONG PIPELINES. A SHORT ON ALONG PIPELINES. A SHORT REVIEWON ALONG PIPELINES. A SHORT REVIEW

Abstract

This paper is a review of ultrasonic technique which is an efficient tool for nondestructive inspection of pipelines. Quantitative detection and evaluation of flaws of different size and geometry, present in pipelines such as corrosion and cracks need extensive examination of ultrasonic wave propagation phenomena. Horizontally polarized shear waves are known as Lamb waves. These waves are useful in the inspection of the ultrasonic type, since they can be detected on the outer and inner surface of the pipelines. The simulation is relatively easy in straight pipelines but much harder for other geometries which are including curvatures, joints, etc. The goal of the present contribution is to apply two simulation techniques to analyze the wave propagation in pipelines. We discuss the curvilinear elastodynamic finite integration technique (CEFIT) and the local interaction simulation approach (LISA), developed by Schubert and Delsanto, respectively. The two techniques are reviewed in the next sections with examples of their applications.