Surface patch normal vector adaptive modification method in electromagnetic scattering simulation modeling

A technology of simulation modeling and electromagnetic scattering, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as complex visibility, troublesome modification one by one, difficulty in viewing and modifying normal vectors, etc., and achieves a wide range of applications , the effect of high execution efficiency

Active Publication Date: 2015-07-29
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, when the model is complex and there are many surface elements, it is very difficult to use ANSYS itself to view and modify the normal vector due to its complicated visibility.
Even with other simulation software such as FEKO, although the outer normal components of each surface of the model are clearly displayed, it is still very troublesome to manually modify them one by one. For some fine structures with cavities and cracks, it is impossible to complete the normal vectors manually. Revise

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  • Surface patch normal vector adaptive modification method in electromagnetic scattering simulation modeling
  • Surface patch normal vector adaptive modification method in electromagnetic scattering simulation modeling
  • Surface patch normal vector adaptive modification method in electromagnetic scattering simulation modeling

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Embodiment Construction

[0018] A method for adaptively modifying surface normal vectors in electromagnetic scattering simulation modeling, the steps are as follows:

[0019] The first step is the creation of surface subdivision files. Use subdivision software such as ANSYS, GMESH, etc. to subdivide surface elements (take triangular units as an example) on the surface of the object. At this time, the normal components of surface elements of the outer surface of the object obtained may be chaotic.

[0020] The second step is the formation of volume segmentation information. Use subdivision software such as ANSYS, GMESH, etc. to subdivide the voxel (take tetrahedron as an example) of the object. When subdivision software such as ANSYS and GMESH cannot perform volume subdivision for relatively complex models, the surface element information is imported into tetgen software to form an internal tetrahedron. So far, all subdivided volume and surface element information have been obtained.

[0021] The th...

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Abstract

The invention discloses a surface patch normal vector adaptive modification method in electromagnetic scattering simulation modeling. A correct outer normal vector of a triangular surface patch can be automatically extracted aiming at the surface subdivision information or face subdivision information of any complex model. Aiming at an electrically large model, millions and even ten millions of grids are formed, and octree subdivision is added in the normal vector modification process to quicken a circulation speed, so the algorithm execution speed is improved by several orders. The conventional complex manual normal vector modification method can be completely substituted, is simple and easy and has a wide application range.

Description

technical field [0001] The invention belongs to the geometric modeling optimization technology in numerical simulation, and is applicable to various disciplines related to vector field simulation, such as computational electromagnetics and computational fluid dynamics, and is specifically an adaptive modification of surface normal vectors in electromagnetic scattering simulation modeling method. Background technique [0002] In many disciplines involving vector field simulation, the correctness of the normal component outside the surface of the simulated object is an important factor affecting the simulation results. Taking the integral equation method in computational electromagnetism as an example, for the magnetic field integral equation or mixed integral equation dealing with closed-domain problems, the formula contains normal vector elements, and it must be ensured that the normal direction of all elements is consistent outward. The effect is more obvious when calculat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 陈如山丁大志樊振宏郝汀
Owner NANJING UNIV OF SCI & TECH
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