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

Abstract

A method for constructing a digital prototype of a shielded nuclear main pump based on a beam finite element model belongs to the design and manufacture of a nuclear reactor coolant pump. Construction steps: 1. Generate the geometric modeling module of the nuclear main pump according to the geometry and assembly relationship of the nuclear main pump; model module, and the beam finite element modeling module of the pump casing assembly; 3. Integrate the rotor assembly, bearing support system and pump casing assembly model, establish the beam finite element overall model, generate the nuclear main pump overall modeling module, and run the nuclear main pump The operating load database module under the parameters is the information support to build a three-dimensional digital prototype of the nuclear main pump; Fourth, the nuclear main pump performance analysis module receives the three-dimensional digital prototype, calls the beam finite element overall model calculation data as input, and outputs the nuclear main pump dynamic response and Simulation results of noise analysis, seismic analysis, and component force analysis. Advantages: The analysis of the dynamic characteristics of the nuclear main pump is accurate.

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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