Ring To Expand The Analysis And Structural Optimization Of The Inherent Characteristics Of The Satellite Antenna Design

In research and development of space antenna, the natural characteristic analysis and structural design optimization are very important. Natural characteristic analysis not only verifies whether the natural frequencies and mode shapes of the antenna are reasonable or not, but also is the base of the structural response analysis, fatigue resistivity computing and the other dynamics problems. The structure design of antenna is a complicated systems engineering, which is generally limited to multiple objects that influence each other, so we need to keep the balance among those objects by decision-making technology of multiple objects to ensure every target optimized.The thesis firstly depicts the components of the antenna structure and clarifies the forming theory of the antenna's reflection paraboloid surface in detail. Then, we establish the finite element analysis models of the antenna in different structure layout, and obtain the corresponding frequencies and model shapes. Finally, according to the importance of each object, we set up the model of multiple objects that aims to maximize the first natural frequency and minimize the mass. Combining orthogonal experiment and variant weighting coefficient method, we formed an effective multiple objects optimized algorithm basing on the neural network and genetic algorithm. In MATLAB software, we realized compute program on antenna structure design optimization and acquired the prime structure parameters.Throw the analysis of the natural characteristic, we find an effective algorithm to enhance the base frequency and give a reference for the structure design of antenna. By the antenna structure optimum design, we obtain the optimum design results and solve a complicated structure design optimization problem with lots of finite element computation, multiple targets and multiple disbursed variants.