【摘要】 本文用动态子结构方法,分析了雷达天线座结构的低阶固有频率、固有振型和影响整个系统低阶性能的刚度薄弱环节。本文提出了天线座结构谐振的锁定转子和自由转子模型,并给出查找影响子结构和系统低阶模态的刚度薄弱环节的方法。本文还采用ITD方法进行了参数识别和功率谱分析,实验与理论分析结果相符。更多还原

【Abstract】 This paper uses dynamic substructure method to study natural frequencies and naturalmodes of lower order for the radar antenna pedestal structure and to find out the weakparts in stiffness that will influence lower order dynamic performance of the entire system. This paper has proposed the models of locked rotors and free rotors of structural reso-nance of the radar antenna pedestal and presented the method by which we can find out theweak parts in stiffness that will affect lower modes of substructure and system. ITD method is adopted to identify parameters and to analyse the powerspectrum. The results of experiment correspend to theoretical computations.更多还原