【摘要】 本文借助二阶准波方程式研究了柱坐标系下FDTD算法的一种吸收边界条件.根据这一边界条件,编制了相应的计算程序检验其吸收特性,并与均匀柱面波传播的简单吸收条件作了比较.计算结果表明,该吸收边界条件具有较好的吸收性能.更多还原

【Abstract】 An absorbing boundary condition for the FDTD equations is developed according to the 2-D quasi-wave fomulation in the cylindrical coordinate. Program has been set up to identify its absorbing characteristics. Compared with the results of the simple absorbing boundary condition under the harmonious cylinderical wave propagation. The results of the presented absorbing boundary condition are good.更多还原