抛物面天线反射面参数化建模与热变形优化分析

为更好地分析卫星在轨运行期间天线主反射面热变形对天线性能的影响，应用PCL，对MSC.PATRAN/NASTRAN进行二次开发，将参数化建模、抛物面拟合、型面精度分析引入有限元计算，并对某大口径复合材料天线主反射面在均匀温度场下的热变形进行了数值模拟，优选出合理的铺层方式，获得了变形后的天线性能指标.研究结果表明:数值模拟探索出适合于在轨卫星天线减少热变形的铺层设计方法，所获变形值、抛物面拟合参数、型面精度误差等结果符合设计要求，为复合材料天线主反射面的设计应用提供了依据，同时解决了通用CAE软件无法预估热变形对天线性能影响的问题. 

Parameterized Modeling and Thermal Deformation Analysis for Paraboloid Antenna Reflector

In order to better analyze the influence of thermal deformation on the performance of antenna during the operation of satellite, MSC.PATRAN/NASTRAN was re-developed using the secondary development tool PCL (patran command language).The parameterized modeling, paraboloid fitting and precision analysis were introduced into the finite element calculation. The thermal deformation of large compositeantenna reflector inuniform temperature field was simulated to acquire the best layer-laying method and the performance indexes of antenna after deformation. The simulation results show that the layer design method for reducing heat-distortion and thermal deformation are figured out, and the paraboloid fitting parameters and precision obtained by numerical simulation agree with design requirements, which is suitable for engineering application and provides the foundation for the design of composite antenna reflector.At the same time, numerical simulation solves the problem thatthe universal CAE software is unable to estimate the influence of thermal deformation on the performance of antennas.