Influence of Shear Effects on the Characteristics of Axisymmetric Wave Propagation in a Buried Fluid-Filled Pipe

Abstract The acoustic propagation characteristics of axisymmetric waves have been widely used in leak detection fluid-filled pipes. related methods and equipment are gradually coming to the market, but their theoretical research obviously lags behind field practice, which seriously restricts breakthrough innovation this technology. Based on fully three-dimensional effect surrounding medium, a coupled motion equation wave buried liquid-filled pipes is derived detail, contact coefficient express coupling strength between medium pipe, then, general was contain pipe soil lubrication contact, compact water air. Finally, corresponding numerical calculation model established solved method. shear effects at interface discussed detail. output indicates that add mass wall, stiffness. With consideration additional wall will resonate specific frequency, resulting significant increase radiation medium. contents great guiding theory engineering application technology pipe.