Modal-FEM混合法对复杂终端进气道RCS的计算

RCS Calculation of Cavity with Complex Termination by Modal-FEM Hybrid Method

对带有复杂结构终端进气道的电磁散射问题进行了研究。给出一种高效的Modal-FEM分析方法,采用改进的模式法处理前端空腔部分,而复杂终端则只需有限元法进行一次求解;最后,在分界面上耦合得到整体的散射结果。与其他数值算法相比,计算结果表明:混合算法在保证精度的前提下减少了计算时间和所需内存,为计算带复杂终端进气道的RCS找到了一条可行的路径。

Electromagnetic scattering of inlet with complex termination was analyzed. An efficient modal-FEM method was proposed, which used modal method to model forward part of the cavity, Finite Element Method to compute the complex termination once, and then coupled them on a proper boundary to get the RCS of the whole cavity. Comparing with other numerical methods, the hybrid technique is accurate and spare great computational time and storage, providing a good access to solve the RCS calculation of cavity with complex termination.