机载SAR天线座结构动力学建模及分析  

Structural Modeling and Analysis on Dynamic Characteristics of Antenna Pedestal in Airborne SAR

作　　者：贺李平[1] 李军兴[1] 刘铭[1] 

机构地区：[1]北京无线电测量研究所,北京100854

出　　处：《雷达学报（中英文）》2012年第2期203-208,共6页Journal of Radars

摘　　要：该文对机载SAR天线座有限元建模及结构动力学特性进行了研究。文中基于结构动力学理论,建立了机载SAR天线座的有限元模型,指出了动力学分析的关键技术,并进行了模态分析和瞬态动力学分析。仿真结果表明:机载SAR天线座的动力学性能满足伺服控制系统带宽和结构强度需求。该文提供的有限元快速建模和分析方法可为机载SAR天线座的轻量化设计提供重要支撑。Finite element modeling and structural dynamic characteristics of antenna pedestal in airborne SAR were studied in this paper. The finite element model of antenna pedestal in airborne SAR was set up on the basis of structural dynamic theory, then, the key technologies of dynamic simulation were pointed out, and the modal analysis and transient analysis were carried out. Simulation results show that the dynamic characteristics of antenna pedestal in airborne SAR can meet the requirements of servo bandwidth and structural strength. The fast finite element modeling and simulation method proposed in this paper are of great significance to the weight reducing design of antenna pedestal in airborne SAR.

关 键 词：机载SAR 天线座 模态 动力学 有限元方法 

分 类 号：TN959.73[电子电信—信号与信息处理] TU311.3[电子电信—信息与通信工程]