中国科学院新疆天文台机构知识库

本发明公开了一种基于ANSYS和ADAMS的大型天线动力学建模方法，主要解决现有的建模方法不能准确描述天线的刚体运动，且无法考虑天线运动过程中的刚弹耦合的问题，其实现步骤是：以大型反射面天线的弹性构件的有限元模型为基础，根据其模态分析结果，选择对天线输出变量贡献度大的模态，利用少量的模态坐标代替节点坐标对弹性变形的自由度进行缩聚，然后导出对应的模态中性文件；通过在ADAMS中建立天线的刚体构件，结合描述弹性体的模态中性文件，进行装配可得描述天线整体运动的动力学仿真模型。本发明克服了传统的建模方法的缺陷，不但可实现高精度动力学建模，而且可明显缩短研制周期。

The invention discloses an ANSYS and ADAMS-based large-scale antenna dynamical modeling method, and mainly solves the problem that the existing modeling method cannot be used for accurately describing rigid motion of an antenna and cannot consider the problem of rigid-elastic coupling in a movement process of the antenna. The modeling method comprises the steps: based on a finite element model of an elastic component of a large reflector antenna, according to a modal analysis result, selecting the modality with the maximal contribution to antenna output, replacing node coordinates with a small quantity of modal coordinates to condense the degree of freedom of elastic deformation, and then exporting a corresponding modal neutral file; by establishing the rigid component of the antenna in ADAMS, combining the modal neutral file describing an elastomer, and performing assembly to obtain the dynamical simulation model describing the integral movement of the antenna. The ANSYS and ADAMS-based large-scale antenna dynamical modeling method overcomes the defects of the traditional modeling method, and a development period can be obviously shortened.