Fast reactor body anti-seismic test modeling method considering fluid-solid coupling effect

Abstract

The invention belongs to the technical field of nuclear power energy, and particularly relates to a fast reactor body anti-seismic test modeling method considering a fluid-solid coupling effect. The method comprises the steps of by considering the fluid-solid coupling effect and adopting an effect control equation analysis method, performing calculation to obtain a general dynamic similarity relationship of a fluid-solid coupling model; by adopting an added mass determination method, according to a principle of meeting a dynamic similarity relationship of solid, obtaining added mass to correctthe overall mass of the model, and enabling a Froude number to strictly meet the similarity relationship; and by adopting a dimension analysis method, performing calculation to obtain a dynamic similarity relationship of fluid parameters. A magnesium alloy material is adopted; calcium chloride simulates liquid sodium; the Froude number is enabled to strictly meet the similarity relationship through a method for adding the added mass; a similarity ratio of acceleration is controlled to be 1; a set of reasonable and accurate similarity ratio is obtained; and the similarity ratio includes a similarity ratio of an inherent frequency, a stress and displacement of a structure, and a similarity ratio of parameters such as an inherent frequency, a wave height, a pressure and the like of liquid sloshing.

Description

technical field [0001] The invention belongs to the technical field of nuclear power energy, and in particular relates to a fast reactor body seismic test modeling method considering the fluid-solid coupling effect. Background technique [0002] In engineering practice, the coupling vibration between liquid sloshing and structure of liquid storage container is a very common and important problem. Since this type of coupling problem involves disciplines such as fluid mechanics, solid mechanics, structural dynamics, computational mechanics and mathematics, its mechanism It is very complicated and difficult to discuss the essence and nature, but solving such coupling problems is of great significance to nuclear power equipment, chemical containers, aerospace, transportation and other fields. [0003] The seismic design of the fast reactor body is an important subject of fast reactor design. According to my country's nuclear safety regulations, the reactor body belongs to the fi...

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Problems solved by technology

However, it is very difficult to determine the additional mass and additional damping in the additional mass method.

In the spring-mass model, the more famous one is the Housner model. In the model, the pressure of the liquid on the structure is divided into pulse pressure and convective pressure, but there are certain difficulties in determining the proportional relationship between the two, and the mass and stiffness in the model are also very large Difficult to determine

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