图9 舰船与海面复合散射的RCSFig.9 The RCS of composite scattering from ship and sea surface

图10 不同风速下舰船与海面的耦合场和总场的变化情况Fig.10 The change of RCS of coupling field and total field from the ship and sea surface with different wind speed

4 结论

本文提出了计算舰船目标、海面与舰船目标耦合散射的Kd-tree 和GO-PO 方法相结合的混合方法.GO-PO方法在处理舰船与海面耦合散射时，可以根据舰船和大尺度海面上面元的空间位置，考虑面元之间的相互遮挡作用，从而更加合理地计算面元的二次散射贡献. 此外，结合Kd-tree方法，该混合模型在保证计算精度的同时提高了计算机仿真的效率. 因此，该方法是相对有效且能够运用于大范围海面与大型舰船目标复合电磁散射特性的研究. 然而，海面与目标之间的电磁耦合机理非常复杂，而且难以完全阐明，对耦合散射机理的一些深入研究还有待继续.

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