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Method for decomposing out-of-core area based on parallel high-order moment method

A high-order moment and outer region technology, applied in the field of computational electromagnetics, can solve problems such as the inability to solve electromagnetic problems with computational time and memory resources, and the increase in resources, to overcome the limitations of computational time and computational resources, high accuracy and reliability effect

Inactive Publication Date: 2017-01-04
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the increasing complexity of military requirements and electromagnetic engineering problems, the resources consumed by the problems to be solved are continuously increasing, especially the limitations of computing time and memory resources make it impossible to solve larger-scale electromagnetic problems, such as large antenna arrays and airborne antenna layout, etc.

Method used

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  • Method for decomposing out-of-core area based on parallel high-order moment method
  • Method for decomposing out-of-core area based on parallel high-order moment method
  • Method for decomposing out-of-core area based on parallel high-order moment method

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Embodiment 1

[0043] refer to image 3 , in the embodiment of the present invention, the method for decomposing the outer nuclear region based on the parallel high-order method of moments includes the following steps:

[0044] Step 1, according to the actual characteristics of the solution target, it is divided into several sub-areas for modeling. For discontinuous problems, extensions to adjacent regions are not required.

[0045] Step 2, perform quadrilateral subdivision on the surface of each sub-region respectively, and extract model information.

[0046] Step 3. For each sub-region, use the method of moments and extra-core techniques to solve it separately. When filling the impedance matrix, when the structure of each sub-region is the same, it only needs to be filled once, and it will be reused in the subsequent iteration process. This saves a lot of matrix filling time.

[0047] Step 4, initialize the current value, set an iteration error range and the maximum number of iterations...

example 1

[0054] Example 1: An umbrella-shaped microstrip antenna array with a unit number of 30×14, the model is as attached Figure 4 shown. Each unit is discontinuous, and the unit spacing is: 0.065m in the x direction, 0.065m in the z direction, monopole excitation, and the frequency is 2.5GHz. Divide it into 14 regions along the z direction. The overall model uses the simulation computing platform 2, and the regional decomposition uses the simulation computing platform 1.

example 2

[0055] Example 2: A microstrip dipole array with a unit number of 1×96, the model is as attached Figure 5 As shown, each unit is continuous. Monopole excitation at a frequency of 3GHz. It is divided into 6 regions along the y direction, and each region extends two units to the adjacent region respectively. The overall model uses the simulation computing platform 1, and the regional decomposition uses the simulation computing platform 1.

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Abstract

The invention discloses a method for decomposing an out-of-core area based on a parallel high-order moment method. The method comprises the following steps of according to the actual characteristics of a solving objective, separating into n subareas, and modeling; for discontinuity, stopping to extend to the adjacent area; for continuity, respectively sectioning each subarea, and extracting model information; for each subarea, respectively solving by the high-order moment method, introducing an out-of-core solving technique when an impedance matrix is filled, and storing data by a hard disc; when the structures of the subareas are the same, filling at one time, and reusing in the subsequent iteration process; initiating the current value, setting one iteration error range and the maximum iteration times, sequentially iterating, solving the current of each subarea, and further solving the field distribution of the whole area. The method has the advantage that the accuracy, realizability and reliability are higher.

Description

technical field [0001] The invention relates to the field of computational electromagnetics, in particular to a method for decomposing an extranuclear region based on a parallel high-order moment method. Background technique [0002] With the continuous development of science and technology, from weather forecasting to missile launch, to the design of various aircraft, the solution to problems in almost all fields is inseparable from numerical calculation. At present, the international research on electromagnetic computing mainly focuses on three aspects, namely, complex structures, electrically large problems, mixed metal and medium problems. Commonly used numerical methods include: method of moments, finite element method and time-domain finite difference method, etc. As early as 1968, the method of moments (MoM) proposed by Harrington has been widely used. Compared with other methods, the method of moments can accurately calculate Electromagnetic radiation and scattering...

Claims

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Application Information

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IPC IPC(8): G06F17/16
Inventor 李艳艳张玉赵勋旺林中朝陈岩
Owner XIDIAN UNIV
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