Construction entity geometric modeling method suitable for multi-heap geometric and characteristic line method

Abstract

The invention relates to a tectonic entity geometric modeling method suitable for a multi-heap geometry and characteristic line method, which comprises the following steps of: (1) defining a geometricunit and Boolean operation of the geometric unit, and giving a description mode of geometric input data; (2) designing an interface for reading an input file, abstracting each geometric unit in the input file into an object-oriented data type, and carrying out geometric modeling; and (3) according to the constructed geometric model, realizing searching of the bottommost material element where thepoint is located, and realizing generation of a flat source approximate region. Geometric structures of different reactor types of reactors can be described according to a specified input rule, a geometric model is stored as object-oriented data through an interface, and geometric preprocessing operation can be completed for solving a neutron transport equation by using a characteristic line method subsequently.

Description

technical field [0001] The invention belongs to a geometric modeling method of a reactor, in particular to a structural solid geometric modeling method suitable for multi-reactor geometry and a characteristic line method. Background technique [0002] Method of Characteristic (MOC, Method Of Characteristics) is one of the methods widely used to solve the neutron transport equation, the key is to discretize the angle variable, and solve the neutron transport equation in differential form on the rays of discrete angles in space . These rays are called characteristic lines and are the imaginary flight paths along which neutrons travel in geometry. Theoretically, the characteristic line method does not impose any restrictions on the geometric shape, so it can handle the transport calculation of any geometric model. [0003] The general process of transport calculation is: given material, geometry, and quadrature group, generating geometric grid and feature line, solving the fe...

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Problems solved by technology

However, the algorithm used for modeling has poor scalability, cannot handle more complex geometric units, and cannot model a large number of repeated hexagonal cells and components, so it cannot be applied to fast reactors and other reactor types.

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