摘要
为了提高在轨卫星天线反射面型面重构过程中的变形能力,减小局部应力及作动力,提高型面重构的精度,对反射面重构中的变形情况进行力学理论分析,得到泊松比参数对型面重构应力的影响。本文给出了反射面在主曲率方向的曲率变化及面内应变变化情况下,使应力最小的泊松比参数取值方法。以一可重构赋形反射面为算例,采用具有阵列椭圆孔结构的泊松比可设计超材料作为发射面材料,通过优化椭圆孔的几何参数,得到所需泊松比参数;以提高型面重构精度及作动力小为目标,通过有限元仿真计算确定反射面的厚度。
In order to improve the deformation ability of reconfigurable reflector,decrease the local stress and power,improve the precision of surface reshaping,the effect of Poisson’s ratio to the reflector reshaping is investigated through mechanical study of reconfigurable reflectors in this paper.A method of determining Poisson’s ratio parameter to minimize the stress of the reflector surface under the vary conditions of the curvature change and the membrane strain change in the main curvature direction is presented.A case of reconfigurable reflector is studied.A Poisson’s ratio designable metamaterial with structure of elliptic voids array is used for the reflector,and the required Poisson’s ratio parameters were obtained by optimizing the geometric parameters of the elliptical voids.In order to improve the reshaping precision of the surface and reduce the operating force,the thickness of the reflector surface was determined by finite element simulation.
作者
徐斌
张华振
侯仰青
江水东
兰澜
Xu Bin;Zhang Huazheng;Hou Yangqing;Jiang Shuidong;Lan Lan(China Academy of Space Technology(Xi’an),Xi’an 710000;Shanghai YS Information Technology Co.,Ltd.,Shanghai)
出处
《航天制造技术》
2021年第3期8-14,共7页
Aerospace Manufacturing Technology
关键词
机械式可重构反射面(MRR)
负泊松比
超材料
mechanically reconfigurable reflector(MRR)
negative Poisson’s ratio
metamaterial
