Experimental measurement device and method for additional mass matrix between circular and cylindrical members of annular fluid region of reactor

Abstract

The invention provides an experimental measurement device and method for an additional mass matrix between circular and cylindrical members of an annular fluid region of a reactor, simplification and scaling are carried out according to a fast reactor model, and five branch circular bearing cylinders are symmetrically placed in a semi-annular region device with an included angle of 180 degrees relative to a main pump bearing cylinder according to a placement relation in a fast reactor body; the semi-annular region device is filled with water, each bearing cylinder is provided with three layers of measuring points, the measuring points are all underwater, and each layer of measuring points is provided with an acceleration sensor and a pressure sensor for measuring acceleration and pressure. A vibration exciter is used for carrying out vibration excitation on each bearing cylinder, and an additional mass matrix is obtained through calculation according to a formula of fluid acting force borne by a plurality of interacting entities in water. According to the invention, the obtained result is more accurate and stable by selecting the sensors and the measuring point positions in a targeted manner. By adopting the measurement mode of the device, the fluid-solid coupling characteristic between adjacent cylinders in a limited drainage basin can be better evaluated.

Description

technical field [0001] The invention belongs to the technical field of nuclear power energy, and in particular relates to an experimental measurement device and method for an additional mass matrix between cylindrical components in an annular fluid domain of a reactor. Background technique [0002] There are many adjacent non-coaxial equipment support cylinders in the reactor body, and the fluid-solid coupling between these support cylinders will increase significantly as the distance between the cylinders decreases. For non-coaxial cylinders, the existing formulas are aimed at the fluid-solid coupling characteristics of a single object in an infinite fluid domain, and the derivation formula for its additional mass is not suitable for the calculation of the fluid-solid coupling parameters of the equipment supports in the stack body. On the one hand, the fluid domain of the stack body is an annular domain, which is inconsistent with the fluid vibration parameters and mode sha...

AI Technical Summary

Problems solved by technology

In general, there are few devices for measuring the additional mass matrix in experiments, but in actual experimental measurements, the selection of sensor types and the arrangement of positions have a great influence on the experimental results, and the fluid-structure interaction parameters measured by different methods have large deviations, often The results of numerical simulation or theoretical derivation are quite different, which increases the uncertainty of evaluation methods such as numerical simulation

Images