摘要
近场高频照射情况下,水下复杂目标声反射强调各个部位、细节对声纳照射的综合作用。对此,引入了声纳目标计算的板块元法,通过3DS MAX软件将任意形状复杂目标表面划分为无数小曲面,由板块元近似小曲面,借助K irchhoff声散射理论完成对水下复杂目标目标强度的计算。该方法克服了声学亮点模型因忽略目标几何结构影响而过于粗糙,以及数值积分方法无法计算非标准几何体目标强度值的缺陷。数值计算及试验结果均验证了该方法的有效性。
When underwater complicated target is irradiated by high frequency signals, the comprehensive effect of all parts on sonar irradiation plays an important role in the reflection of the target. Aiming at this problem, the planar element method is introduced into sonar target computation. The surface of any arbitrary shape target is divided into many small curved faces by 3DS MAX software, which are approximated by planar elements. Then underwater complicated target strength is predicted by Kirchhoff acoustic scattering theory. The present method has solved the problems that the existing acoustic highlight model is inaccurate because of ignoring the geometry of target, and the numerical integration can not calculate the target strength of irregular objects. The availability of the present method is verified by numerical calculation and experiment.
出处
《鱼雷技术》
2010年第4期258-262,267,共6页
Torpedo Technology
关键词
水下复杂目标
目标强度
板块元法
预报
声散射理论
声学亮点模型
数值积分
underwater complicated target
target strength
planar element method
prediction
acoustic scattering theory
acoustic highlight model
numerical integration
