定量无损评估进展年会（QNDE, Annual Review of Progress in Quantitative Nondestructive Evaluation）是无损检测领域的重要学术会议，每年在美国不同的城市举行一次。第39届年会于2012年7月15到20日在美国科罗拉多州首府丹佛召开，...定量无损评估进展年会（QNDE, Annual Review of Progress in Quantitative Nondestructive Evaluation）是无损检测领域的重要学术会议，每年在美国不同的城市举行一次。第39届年会于2012年7月15到20日在美国科罗拉多州首府丹佛召开，全世界无损检测领域的领头研究单位、展开更多
We investigate the guided waves in a multi-layered cylindrical elastic solid medium. The dispersion function of guided waves is usually complex and the dispersion curves of all modes are not conveniently obtained. Her...We investigate the guided waves in a multi-layered cylindrical elastic solid medium. The dispersion function of guided waves is usually complex and the dispersion curves of all modes are not conveniently obtained. Here we present an effective method to obtain the dispersion curves of all modes. First, the dispersion function of the guided waves is transformed into a real function. The dispersion curves are then calculated for all the modes of the guided waves by the bisection method. The modes with the orders n = 0, 1, and 2 are analysed in two- and three-layer media. The existence condition of Stoneley wave is discussed. The modes of the guided waves are also investigated in a two-layer medium, in which the velocity of shear wave in the outer layer is less than that in the inner layer.展开更多
文摘定量无损评估进展年会（QNDE, Annual Review of Progress in Quantitative Nondestructive Evaluation）是无损检测领域的重要学术会议，每年在美国不同的城市举行一次。第39届年会于2012年7月15到20日在美国科罗拉多州首府丹佛召开，全世界无损检测领域的领头研究单位、
基金Supported by the National Natural Science Foundation of China under Grant No 10374098.
文摘We investigate the guided waves in a multi-layered cylindrical elastic solid medium. The dispersion function of guided waves is usually complex and the dispersion curves of all modes are not conveniently obtained. Here we present an effective method to obtain the dispersion curves of all modes. First, the dispersion function of the guided waves is transformed into a real function. The dispersion curves are then calculated for all the modes of the guided waves by the bisection method. The modes with the orders n = 0, 1, and 2 are analysed in two- and three-layer media. The existence condition of Stoneley wave is discussed. The modes of the guided waves are also investigated in a two-layer medium, in which the velocity of shear wave in the outer layer is less than that in the inner layer.
