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.