【摘要】 以有机玻璃中铁球的共振散射为例 ,研究了各向同性媒质中球状散射体的共振模式缺损问题 .通过对纵波和横波散射系数的数值分析 ,指出在纵波入射时的散射纵波 (简称p→p散射 )中零阶分波会出现共振模式缺损 ,导致共振模式缺损的数值原因是纵波散射系数分式中分子和分母零点位置几乎相同 .更多还原

【Abstract】 Resonance scattering by iron spheres in plaxiglass matrix is investigated numerically. Based on the analysis of the zero and singular points of the scattered longitudinal and transverse wave coefficients, the absence of some resonance modes is found to appear only in the scattered longitudinal wave modes of the lowest order. The absence of some resonance modes results from the fact that the zero points of the numerator and denominator of scattered longitudinal wave coefficients are located at the same positions in the complex frequency plane.更多还原