Dynamic analysis of a nuclear reactor with fluid–structure interaction: Part I: Seismic loading, fluid added mass and added stiffness effects
✍ Scribed by Jean-François Sigrist; Daniel Broc; Christian Lainé
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 909 KB
- Volume
- 236
- Category
- Article
- ISSN
- 0029-5493
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✦ Synopsis
The present paper is related to the dynamic (seismic) analysis of a naval propulsion ground prototype (land-based) nuclear reactor with fluid-structure interaction modelling. Many numerical methods have been proposed over the past years to take fluid-structure phenomenon into account in various engineering domains, among which nuclear engineering in seismic analysis. The purpose of the present paper is to make a comparative study of these methods on an industrial case, namely the pressure vessel and internals of a nuclear reactor. A simplified model of the pressure vessel and the internal structure is presented; fluid-structure interaction is characterised by added mass, added stiffness and coupling effects. The basic principles of the mathematical techniques for fluid-structure modelling and dynamic methods used in the analysis are first presented and then applied to compute the eigenmodes and the dynamic response of the fluid-structure coupled system with various numerical procedures (quasi-static, spectral and temporal approaches). Numerical results are presented and discussed; fluid-structure interaction effects are highlighted. As a main conclusion, added mass effects are proved to have a significant influence on the dynamic response of the nuclear reactor.