Aseismatic Strength Analysis of Main Nuclear Reactor Pump Based on Real Three Dimension Model

When the finite element method is used in the pump strength analysis,the shell element is often used,which has the same thickness for the whole pump.3 dimension main pump model that has the same size and shape as the real main pump is built on the software CATIA.Tetrahedron element,instead of shell element,is used to build the finite element grid that may overcome the same thickness approximation.The calculation is more reliable by the tetrahedron element.The strength of auxiliary reactor pump is safe and fulfills the requirement of the standard document.calculated under the seismic load and temperature field.The maxim Von Mises equivalent stress is 29.9MPa,which is smaller than the allowable stress strength 132.825 MPa in ASME-III ND3400.The main pump is