| Antenna is an importance component of radar system as an equipment of transmitting and receiving radar electromagnetic wave. It should have high surface precision and enough intensity and rigidity. But the limited space and weight target make the contradictions between space and rigidity,rigidity and weight. The features of quick setting up and disassembling mobile radar sharpen the contradictions. So the structure form of planar antenna array should be designed by the advanced CAE technology and the theory of structural analysis. The effective measures should be adopted to promise the realization of design target based on the scientific analysis and optimization design.FEM is a very important tool in analysis of structural mechanics, it provides technical guarantee for the dependability and efficiency of product, in the same time a lot of experiments are avoided, the costs of design are reduced, the efficiency of design are enhanced, the periods of exploitation are shorten, finally the competition of product are improved and gain the advantage of subsistence.This paper introduced how to build FEM model of antenna with I-DEAS software and analysis the rigidity and intensity of antenna in different work state. According the analyzed result, an optimal structure design is obtained to solve the contradictions between mobility and limited space, space and rigidity, rigidity and weight, and precision and disassembling. Based on those above results, 3D part model, assembly and mechanism simulation could be designed, finally 2D drawing could be obtained. In this way those problems discovered in proto type could be detected in 3D design and solved, consequently the design precision and efficiency are greatly improved. |
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