50m口径天线结构有限元模型的建立方法

Establishment Method of a Finite Element Model of 50m Antenna Structure

给出了50m口径天线结构有限元计算模型的建立过程和方法,描述了天线结构组成,通过对结构特征及单元类型的分析,明确了有限元模型中单元的选取方法和使用原则。提出并比较了箱型粱等腔体结构的2种模型建立方法。给出了边界条件的设定方法、载荷的计算方法及计算工况的选取原则,分析了以上因素对计算结果的影响。考虑到计算工作量,讨论了将大型复杂模型分块建立再组合计算的可行性。

In this paper,the establishment method of a finite element model of 50m antenna structure is provided and the composition of antenna structure is described. The principle of finite element type application is given. Two methods to simulate box-beam structure are provided and compared. The boundary condition, load computation and selection of design condition are also described. The influence of these factors to results is also analyzed. For considering computational effort, this paper discusses the feasibility of establishing by partitioning the large and complex model and computation after recombined.