CAJ | 학술논문

基于耦合声学边界元理论对水下目标低频声散射特性进行仿真研究。为了验证此数值方法准确性，对水中弹性球壳在平面波入射下的反向散射特性进行数值计算。结果表明，散射声场的数值计算结果和解析解较好吻合。在此基础上，本文探究刚性BeTSSi-Sub[1]和弹性BeTSSi-Sub的全向散射特性，对比发现，刚性BeTSSi-Sub的目标强度大于弹性BeTSSi-Sub的目标强度。通过对形状不同弹性的BeTSSi-Sub的目标强度对比发现，在低频段潜艇上舵对潜艇目标强度的影响比上层建筑的影响大。
기우우합성학변계원이론대수하목표저빈성산사특성진행방진연구。위료험증차수치방법준학성，대수중탄성구각재평면파입사하적반향산사특성진행수치계산。결과표명，산사성장적수치계산결과화해석해교호문합。재차기출상，본문탐구강성BeTSSi-Sub[1]화탄성BeTSSi-Sub적전향산사특성，대비발현，강성BeTSSi-Sub적목표강도대우탄성BeTSSi-Sub적목표강도。통과대형상불동탄성적BeTSSi-Sub적목표강도대비발현，재저빈단잠정상타대잠정목표강도적영향비상층건축적영향대。
Based on the coupled boundary element techniques, this paper simulated the low-frequency acoustic scattering characteristics of the underwater targets. In order to validate this numerical method, the backscattering of the elastic shell in water was calculated when the incident wave encountered it. Comparison of the numerical results with the corresponding analytical solutions shows that they are in good agreement. On this basis, this paper simulated the omni-directional scattering of the rigid BeTSSi-Sub and the elastic BeTSSi-Sub. The results showed the rigid BeTSSi-Sub′s target strength is greater than the elastic BeTSSi-Sub′s. Comparing the target strength of the elastic BeTSSi-Sub with different shapes, the results showed that the helm′s impact to the submarine target strength is greater than the superstructure′s.