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采用超声导波法对海底管道进行健康监测和缺陷检测,需要研究导波在深水环境下的海底管道结构中的传播特性。该文采用全局矩阵法计算纵向导波在水下带粘弹性层输油管道中的传播位移和应力,得到频散曲线和个别模态(如α模态与L(0,4)模态)的波结构。通过对纵向导波频散曲线和波结构的详细分析,阐述了纵向导波在水下带粘弹性层输油管道中的传播规律。这既有益于加深对导波在深水环境下的海底管道结构中传播机理的理解,也可为设计采用纵向导波进行海底输油管道损伤检测系统提供技术支撑。
The use of ultrasonic guided wave method to monitor the health of submarine pipelines and detect defects, it is necessary to study the propagation characteristics of guided waves in submarine pipelines under deep water environment. In this paper, the global matrix method is used to calculate the propagation displacement and stress of the longitudinal guided wave in the submerged viscoelastic layer pipeline. The dispersion curves and the waveforms of individual modes (such as α mode and L (0,4) mode) are obtained. structure. Based on the detailed analysis of longitudinal wave dispersion curves and wave structures, the propagation of longitudinal guided waves in submerged viscoelastic layer pipelines is described. This not only helps to deepen the understanding of the propagation mechanism of the guided wave in submarine pipelines under deepwater environment, but also provides technical support for the design of the longitudinal guided wave detection system for submarine pipelines.