Analysis of fluid-structure interaction problems in nuclear reactor engineering
by Robert Engel
International Journal of Computer Applications in Technology (IJCAT), Vol. 7, No. 3/4/5/6, 1994

Abstract: This paper presents the development over the last two decades in solving fluid-structure interaction problems by computer methods in the nuclear power generation industry. The term fluid structure interaction describes phenomena in which both fluid and structural responses are dynamically coupled. Studies of the phenomena are usually performed to determine whether a given mechanical design will withstand expected loadings. The fluid moving with the structure has an important effect on the dynamics of the vibrating structure, particularly its natural frequencies. Shock waves exert pressure loads on submerged surfaces, which can be substantially reduced or even amplified, depending on the structural dynamic response. Large structures in nuclear power plants are often separated by narrow fluid-filled cavities and therefore represent typical fluid-structure coupled systems. The reactor pressure vessel internals of a commercial pressurised water reactor are taken as an example to illustrate the development in solving fluid-structure interaction problems with general-purpose finite element programs only, or in combination with special-purpose computer programs. Comparisons with test results are also presented.

Online publication date: Mon, 09-Jun-2014

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