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Theoretical Study and Related Applications of the Conformal Finite Difference Time Domain

Author: HeYe
Tutor: CaoQunSheng
School: Nanjing University of Aeronautics and Astronautics
Course: Electromagnetic Field and Microwave Technology
Keywords: Conformal FDTD method Goal modeling PEC Media conformal technique Electromagnetic Scattering
CLC: O441.4
Type: Master's thesis
Year: 2010
Downloads: 46
Quote: 0
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Abstract


The finite-difference time-domain (FDTD) method due to its simple mathematical calculation characteristics unique to get people's attention and a wide range of applications in many computational electromagnetics. Conformal conformal technology into the FDTD method the FDTD (CFDTD) method in dealing with complex geometric surfaces to improve the calculation accuracy and has unique advantages. The main work of this paper include: (1) CFDTD conformal grid technology and research and CFDTD conformal method of treatment of curved grid; (2) the preparation of a standardized modeling program, a variety of three-dimensional surface model modeling analysis (including sphere, ellipsoid, rotating parabolic), and extract the corresponding conformal mesh parameters; (3) to derive the two-dimensional, three-dimensional perfect electric conductor and media CFDTD of iterative relationship establish CFDTD method three-dimensional calculation procedures, calculate a variety of model radar cross section RCS; (4) on the basis of a simple model, the more complex target model, namely the \\premise, CFDTD technology coated with radar absorbing characteristics studies absorbing materials in the the missile surface coating on using the media conformal FDTD technology, missile conductor surface coating material of the RCS calculated results show that its effective reduce the radar cross section of the missile to verify the correctness and usefulness of the of the used CFDTD technology, also effective method to calculate scattering properties of the conductive coating material. The main content of this paper: the first chapter: a brief introduction the FDTD method background, characteristics, applications, and CFDTD method, indicating the significance of the work; Chapter II: Introduction to the basic principles and algorithms of the FDTD algorithm, CFDTD algorithm, of three elements: the difference scheme, the stability of the solution conditions, absorbing boundary conditions; Chapter: introduces introduced conductor the PEC and medium body conformal technique; Chapter 4: conformal PEC and medium technology details the total-shaped grid generation methods, modeling rules, a variety of the model modeling results and final RCS; Chapter 5: conductor surface coated with a dielectric conformal FDTD method introduces this processing; Chapter 6: conclusions, including a summary of the work of this article and the outlook for late work.

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CLC: > Mathematical sciences and chemical > Physics > Electromagnetics,electrodynamics > Electricity and Magnetism > Electromagnetic waves and electromagnetic fields
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