Abstract
The fluid–structure interaction (FSI) that occurs in the graphite core submerged in molten salt has a great influence on the vibration of the core under seismic conditions in thorium molten salt reactor-liquid fuel (TMSR-LF1). The added mass method is an important way to study the phenomenon. In this paper, a bidirectional fluid–structure coupling method was established to calculate the added mass of the graphite brick, and the numerical simulation results were in good agreement with the experimental results. On this basis, the sensitivity analysis of added mass factors was carried out, such as the size of gaps between components, the geometric shapes of graphite bricks and the molten salt temperatures, etc. The results show that these factors influence the added mass in different degrees and the size of the gap is the most important factor affecting the added mass. The results can provide FSI parameters for structural dynamic analysis and offer the assistance for the design and manufacture of the graphite core.
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