Method for constructing shielded nuclear main pump digital prototype based on beam finite element model

Abstract

The invention discloses a method for constructing a shielded nuclear main pump digital prototype based on a beam finite element model, and belongs to nuclear reactor coolant pump design and manufacturing. The method comprises the following construction steps: 1, generating a nuclear main pump geometric modeling module according to a nuclear main pump part geometry and assembly relationship; 2, onthe basis of the nuclear main pump geometric model, generating a rotor assembly beam finite element modeling module, a bearing support system modeling module and a pump shell assembly beam finite element modeling module; 3, integrating a rotor assembly model, a bearing support system model and a pump shell assembly model, establishing a beam finite element overall model, generating a nuclear mainpump overall modeling module, and constructing a nuclear main pump three-dimensional digital prototype by taking an operation load database module under nuclear main pump operation parameters as information support; and 4, the nuclear main pump performance analysis module receiving the three-dimensional digital prototype, calling beam finite element overall model calculation data as input, and outputting simulation results of nuclear main pump dynamic response and noise analysis, anti-seismic analysis and part stress analysis. The method has the advantage of accurate analysis of nuclear main pump dynamic characteristics.

Description

technical field [0001] The invention relates to a method for constructing a digital prototype of a shielded nuclear main pump based on a beam finite element model, and belongs to the field of nuclear reactor coolant pump design and manufacture. [0002] technical background [0003] The nuclear main pump is the equipment that drives the circulation of the high-temperature, high-pressure and high-radioactive working medium in the nuclear island, transfers the heat energy of the nuclear fission of the reactor core to the steam generator to generate steam, and drives the steam turbine to generate electricity. It is also the only continuous high-speed rotating equipment in the nuclear island. As a part of the pressure-bearing boundary of the primary circuit, the nuclear main pump is required to operate efficiently and stably under various complex working conditions, without unplanned outages, and the working medium must be strictly free from external leakage. Under extreme condit...

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Problems solved by technology

[0007] Purpose and task of the present invention: to overcome the existing nuclear main pump performance simulation numerical model which only considers the effect of one or two operating loads, fails to fully consider dynamic characteristics such as multi-load and shielded pump rotor coupling vibration, and cannot accurately evaluate the nuclear main pump Problems with dynamic response, noise, seismic, force analysis and other characteristics

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