飞行器RCS计算中曲面剖分技术研究与实现

Research and Realization of Surface Triangulation in Predicting RCS of Aircraft

飞行器RCS预估计算是隐身技术研究中的重要研究内容。论述了利用飞行器外形的特点,在满足飞行器设计误差的前提下使用平面和柱面对飞行器的整机作NURBS曲面逼近,然后用柱面和平面剖分代替曲面的剖分。实现了飞行器整机模型的指定边长的三角剖分。这种方法不同于有限元计算的网格剖分,具有网格单元与曲面曲率无关和剖分速度快等特点。

Predicting RCS of aircraft is the important issue of stealth technology. The paper presents an approach that uses plane and cylindrical to approximate aircraft’s shape, meeting well the requirements for RCS computation. Then triangulation of surfaces is substituted by that of the plane and cylinder. The technique is different from the mesh generation of FEA. It possesses the characteristic that the shapes of mesh cells have nothing to do with the curvature of surfaces and can realize triangulation of fair meshes with specified edge lengths at high speed.