CAJ | 학술논문

为了解决一阶抛物近似 KZK 方程无法直接对相控非线性声场进行建模的问题，依据原频声场准直特性构建等效参量阵原频自然指向性声场模型，建立其与原频相控声场的等效关系，将相控非线性声场的建模问题转换为等效参量阵声源条件的求解问题，同时提出算子分裂时域有限差分数值计算方法，实现了基于 KZK 抛物方程的矩形孔径参量阵相控非线性声场数值计算。以 SES2000标准型参量声呐辐射相控非线性声场为研究对象，开展了计算机仿真和水池对比实验研究，研究结果验证了构建声场模型及其数值计算方法的有效性。
위료해결일계포물근사 KZK 방정무법직접대상공비선성성장진행건모적문제，의거원빈성장준직특성구건등효삼량진원빈자연지향성성장모형，건립기여원빈상공성장적등효관계，장상공비선성성장적건모문제전환위등효삼량진성원조건적구해문제，동시제출산자분렬시역유한차분수치계산방법，실현료기우 KZK 포물방정적구형공경삼량진상공비선성성장수치계산。이 SES2000표준형삼량성눌복사상공비선성성장위연구대상，개전료계산궤방진화수지대비실험연구，연구결과험증료구건성장모형급기수치계산방법적유효성。
In order to solve the problem of that phased nonlinear acoustic field could not be modeled by one order parabolic approximation KZK equation,an equivalent parametric array primary frequency natural directivity acoustic field model was built based on the collimation characteristic of primary frequency acoustic field.The equivalent relation between this field and the primary frequency phased acoustic field was deduced,so the problem of phased nonlinear acoustic field modeling was transferred to the calculation of equivalent parametric array source condition,and an operator split time domain finite difference calculation method was derived.The rectangular aperture parametric array phased nonlinear field calculation based on KZK equation was realized.Taking the SES2000 parametric array acoustic field as object,the phased nonlinear acoustic model and the corresponding field calculation method were examined by computer simulation and pool contrast experiment.