各向异性阻抗劈的绕射研究对雷达探测、电波传播和高频天线设计等方面有着重要的意义。当平面波照射在各向异性阻抗表面上时,可能激励起导波模形式的表面波,在表面波的传播过程中,若遇到几何参数或者物理参数不连续的目标(例如劈边)则...各向异性阻抗劈的绕射研究对雷达探测、电波传播和高频天线设计等方面有着重要的意义。当平面波照射在各向异性阻抗表面上时,可能激励起导波模形式的表面波,在表面波的传播过程中,若遇到几何参数或者物理参数不连续的目标(例如劈边)则会产生绕射场。考虑到斜入射情况下电场与磁场的耦合,在一致性几何绕射理论(uniform geometrical theory of diffraction,UTD)框架内应用摄动原理,以及Van der Waerden方法得到斜入射情况下各向异性阻抗劈散射场中表面波的绕射场贡献。展开更多
The problems of diffraction of elastic waves in anisotropic media are investigated. The mathematical structures of the wave fields are found out by using the complex function method, and based on which the method for ...The problems of diffraction of elastic waves in anisotropic media are investigated. The mathematical structures of the wave fields are found out by using the complex function method, and based on which the method for solving the problems of the first and second boundary value and the expressions of the dynamic stress concentraction factor are given.展开更多
文摘各向异性阻抗劈的绕射研究对雷达探测、电波传播和高频天线设计等方面有着重要的意义。当平面波照射在各向异性阻抗表面上时,可能激励起导波模形式的表面波,在表面波的传播过程中,若遇到几何参数或者物理参数不连续的目标(例如劈边)则会产生绕射场。考虑到斜入射情况下电场与磁场的耦合,在一致性几何绕射理论(uniform geometrical theory of diffraction,UTD)框架内应用摄动原理,以及Van der Waerden方法得到斜入射情况下各向异性阻抗劈散射场中表面波的绕射场贡献。
文摘The problems of diffraction of elastic waves in anisotropic media are investigated. The mathematical structures of the wave fields are found out by using the complex function method, and based on which the method for solving the problems of the first and second boundary value and the expressions of the dynamic stress concentraction factor are given.
