Abstract:

This paper presents the concept of stiff optimum design, based on real design requirements of radar antenna structures.An optimality criterion of plate- truss composite antenna structures has been developed by using surface accuracy of the antenna as main constraint, both cross-sectional areas of bars and thicknesses of plane stress plates as design variables as well as the weight of the antenna structure as objective function. Through alternatively optimum design, we have obtained an optimal structure which not only meets design requirements but also has lightest weight. Thus，it is an efficient and convenient approach,which will be extensively used. Through both calculation of two examples and comparison with solutions obtained by common design algorithm, it has been showed that algorithm has efficiency and utility.