板块元法求目标散射特性中面元划分方法研究

摘要

运用基于物理声学法的板块元法求解目标散射场时，面元划分直接决定了算法计算的速度和精度。文中研究板块元法中面元划分问题，给出了基于Gordon积分的远场板块元公式。用AN-SYS建立了球体模型，借助该模型，分析了模型面元划分尺度对模型目标强度计算速度与精度的影响。针对低频和高频的不同情况，推导出模型面元划分的标准和方法。用所提出的方法对圆柱模型进行网格化，通过仿真计算验证了该方法的正确性。%The velocity and precision of planar element method based on kirchhoff approxiation was de-cided by the element partition w hen calculating target scattering characteristic .T he paper provided far field planar element method formulae of Gordon integral algorithm .The rigid sphere model was built by ANSYS .Then the relation between element partition and algorithm performance was analysed u-sing rigid sphere model .On the basis above ,the paper educed the method of element partition .At last , the validity of method the paper advanced was validated by column model simulation .