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Spline surface processing method applied to fusion reactor neutron transport computation and based on equipotential surface

An isosurface and reactor technology, applied in image data processing, instruments, etc., can solve problems such as failure of neutron transport calculation and ignoring CAD models

Active Publication Date: 2015-01-07
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

The existing technology is to simplify the spline surface on each entity separately. In this way, regardless of the surface relationship between the entities in the CAD model, it is very easy to form gaps or interference in the generated neutron transport calculation model, which may cause Failure of neutron transport calculations

Method used

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  • Spline surface processing method applied to fusion reactor neutron transport computation and based on equipotential surface
  • Spline surface processing method applied to fusion reactor neutron transport computation and based on equipotential surface
  • Spline surface processing method applied to fusion reactor neutron transport computation and based on equipotential surface

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Embodiment Construction

[0020] In order to establish a physical calculation model based on the actual CAD model, it is necessary to solve the problem of simplification of adjacent spline surfaces existing in the actual CAD model. Simplified results cannot contain interference, voids, etc. For this reason, the adjacent spline surfaces between CAD entities need to be simplified through the following steps.

[0021] 1. Assume that Fa and Fb are two adjacent spline surfaces of geometry S1 and S2, and set the parameter equations of the spline surface as follows:

[0022] x=fx(u,v), y=fy(u,v), z=fz(u,v), select the values ​​of parameters u and v at a certain interval, and obtain a set of vertices on the spline surface, At the same time, the values ​​of parameters u and v are selected at certain intervals on the edges of the spline surface to obtain a group of vertex sets on the edges of the spline surface. Connect the adjacent three vertices of these vertices to form a plane piece, and connect the plane ...

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Abstract

Disclosed is a spline surface processing method applied to fusion reactor neutron transport computation and based on an equipotential surface. Due to the fact that high-order curved surfaces such as spline surfaces can not be processed during neutron transport computation, the spline surfaces in a CAD model need to be simplified into low-order curved surfaces before neutron transport computation, and the simplification of the spline surfaces is an important step in neutron transport computation modeling based on CAD. According to the method, spline surfaces between similar geometries with adjacent spline surfaces are simplified by establishing the equipotential surface, automation is realized, an outcome model obtained after simplification is free of interference and gaps, and requirements of neutron transport computation are met.

Description

technical field [0001] The invention relates to a spline surface processing method in fusion reactor neutron transport calculation based on equipotential surfaces, which is applied to fusion reactor neutron transport calculation work. Background technique [0002] In the design stage of a fusion reactor or device, neutronics analysis is required, and the key step is to perform neutron transport calculations. At present, there are mature technical means for converting CAD models into neutron transport models based on CAD models. However, the CAD models of complex fusion reactor devices may contain high-order surfaces such as spline surfaces. These surfaces are cannot be used directly to generate neutron transport models. Before creating the neutron transport model, it is necessary to process the spline surface through certain steps, and use the low-order surface to fit the spline surface. The simplification of the strip surface is an important step in the modeling of neutron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T19/00
Inventor 俞盛朋樊晓菁罗月童程梦云龙鹏程
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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