Mechanical-thermal-electromagnetic Performance Characterization and Coupling Analysis Method of Lattice Structure Antenna Window

doi:10.3901/JME.2025.16.347

Abstract

Abstract: The lattice structure has advantages such as high specific stiffness, good heat resistance, excellent transmission performance, and strong designability. It can meet the multifunctional requirements of antenna windows for high-speed aircraft. To address the issues of lacking analysis methods and long design iteration cycles for lattice antenna windows, a mechanical-thermal-electromagnetic coupling analysis method for lattice structures is proposed. The characterization methods for mechanical and thermal properties of lattice structures are provided based on homogenization method. The characterization methods for electromagnetic properties of lattice structures is provided based on S-parameter inversion method. The mechanical-thermal-electromagnetic coupling analysis method for ceramic lattice structures is established. The influence of design parameters on the mechanical, thermal, and electrical performance of the antenna window is studied. And the key design index of mechanical-thermal-electromagnetic performance of lattice antenna window is presented. The research results indicate that the proposed method for mechanical-thermal-electromagnetic coupling analysis of lattice structures has good accuracy, with an error of less than 4.32%. The ratio of cell rod diameter to side length is the key design index of lattice structure. The mechanical, thermal, and electromagnetic performance of the lattice antenna window depend on the ratio of the rod diameter to side length of the unit cell, with a larger ratio leading to greater stiffness, better thermal conductivity, and poorer transparency of the lattice antenna window. The proposed method for mechanical-thermal-electromagnetic coupling analysis of lattice structures provides a solution for the performance analysis of lattice antenna windows.

Key words: lattice structure, properties characterization, mechanical-thermal-electromagnetic coupling analysis, S-parameter inversion, homogenization method

CLC Number:

V414
O32

GE Mingxuan, YANG Lixin, LI Yanbin, FEI Qingguo. Mechanical-thermal-electromagnetic Performance Characterization and Coupling Analysis Method of Lattice Structure Antenna Window[J]. Journal of Mechanical Engineering, 2025, 61(16): 347-357.

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