Active Phased Array Antenna Structure Analysis

At present, finite element analysis technique has been widely applied in a varietyof engineering fields, such as space, marine, automobile, and so on. It plays animportant role in evaluating product design performance and shortening manufacture cycle. Inthis paper, simulation analysis of a space-borne radar antenna is implemented based on theanalysis platform of MSC.NASTRAN, modeling and post-processing platform ofMSC.PATRAN. The technology of finite element analysis is adequately combined with aengineering projects. The problems of natural frequency, structure intensity, dynamicresponse and thermal deformation, which are encountered in antenna research anddevelopment, are solved.Based on the research of finite element analysis and modeling, mode analysis,sine-vibration analysis, impact analysis, random vibration analyses are carried out on theantenna. Finally, thermal analysis under condition of space environment is executed. Naturalvibration frequency and modal shape are obtained through mode analysis; dynamic stressdistribution of the antenna and dynamic response of unit parts on the antenna array areobtained through dynamic response analysis, so that the structural performances of activeinstalling plates in a variety of conditions are validated; deformation of active phased arrayantenna under various temperature conditions are forecasted through thermal analysis,offering proof for the exact forecast of electricity performances under space temperaturecondition.Lastly, based on the simulation analysis results, the weakness design existingin the structure design of antenna are gave out, and reasonable measures are broughtforward for the improvement of structure design.