文档介绍：多物理场耦合技术在雷达天线罩设计中的应用
[苏全永、任建华、吉建民]
[北京遥感设备研究所,100854]
[ 摘要] 雷达天线罩,通常是由流线型的具有无线电透明特性的非金属罩体以及连接环组成,其主要用途
是保护天线在飞行的恶劣环境中能够正常工作。本文主要讨论最常用的陶瓷材料天线罩多物理场耦合的强度性
能。天线罩的气动加热及过载越来越严重,尤其是气动加热引发的热环境问题已经成为天线罩结构设计所面临
的突出问题。由于天线罩温度场的分布不均会引起结构的热应力,同时天线罩还要受到气动载荷和惯性载荷的
作用,因此需要先进行相应的瞬态热分析,然后再进行热强度分析,最后将温度场和应力场进行耦合计算。采
用有限元方法模拟天线罩受到的温度载荷及气动载荷情况,可以有效地计算出天线罩在各种力和热载荷作用下,
内部温度场及应力场的分布情况,并对试验时综合应力比较大的位置进行监控指导。本文仿真计算后认为天线
罩强度上能够满足飞行热强度的要求,并给出天线罩上的应力场分布。
[ 关键词] 天线罩、多物理场、耦合、热强度
Application of multi-physical fields coupling in
radome design
[Su quanyong Ren jianhua Ji jianmin]
[Beijing Institue of Romote Sensing Device,100854]
[ Abstract ]
Radome posed of the streamline nonmetal radome which have the wireless limpidity
feature and the linked ring. The main purpose of the radome is protecting antanna could work
regular under a severe environment. The article is discussing the strength property of
frequently-used ceramic material radome’s multi-physics field coupling. The pursue of super
speeding and high- flexibility make the radome’s aerodynamic heating and overload more and
more serious, especially the heat environment trigger by aerodynamic heating have been the
extrusive problem in the radome structure design. The temperature distribution of the radome is
non-uniform and thus the radome is deformable due to its thermal stress. At the same time, the