热-力-电耦合下天线罩电性能仿真及分析
A Simulation Analysis of Electrical Performance of Radome under Condition of Thermo-Mechanical-Electrical Coupling
吉建民 1王伟 1余慧龙 1刘涓 1陈博1
作者信息
- 1. 北京遥感设备研究所,北京,100854
- 折叠
摘要
在实际飞行工况下,热力载荷会改变高速飞行器天线罩原有的电磁特性,从而影响制导性能.提出了一种基于六面体网格划分的热-力-电耦合模型及仿真方法,可准确表征高速飞行工况下天线罩介电温漂和结构变形对电性能的影响.基于天线罩热-力-电共享网格模型,首先通过瞬态热仿真得到天线罩响应温度场,通过静力分析得到天线罩结构变形场.然后,将天线罩介电温漂和结构变形准确传递到其电磁仿真模型中,并采用三维射线跟踪法计算其电性能.最后通过一个典型算例对高速飞行工况下天线罩电性能的变化进行仿真和分析,结果表明电性能变化非常明显,也进一步说明了所提方法的可行性和研究的必要性.
Abstract
For high speed aircrafts radome,the performance of guidance system is often affected with ther-mal and mechanical loads changing its original electromagnetic characteristics under actual flight condi-tions.A Thermo-Mechanical-Electrical(TME)coupling model based on hexahedral mesh partitioning and a simulation method are proposed,and these two methods being employed,the effects of dielectric tem-perature drift and structural deformation on the electrical performances of radome at high-speed flight can be characterized accurately.First,based on the TME Sharing Mesh Model(TME-SMM),the temperature field of radome is obtained by transient thermal simulation,and the deformation field of radome is obtained by static analysis.And then,the dielectric temperature drift and structural deformation of radome are ac-curately transferred into its electromagnetic simulation model,and the electrical performance of radome is calculated by three-dimensional ray tracing method.Last,a typical example is utilized for simulating and analyzing the variation of the electrical performance of radome at high-speed flight.The results show that the variation is obvious,and the feasibility and research necessity of the method are further illustrated.
关键词
高速飞行器/天线罩/热-力-电耦合/介电温漂/结构变形/电性能Key words
high speed aircrafts/radome/thermo-mechanical-electrical coupling/dielectric temperature drift/structural deformation/electrical performance引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据