Article ID Journal Published Year Pages File Type
8067173 Annals of Nuclear Energy 2018 5 Pages PDF
Abstract
A finite element method was used to simulate the vibration characteristics of helical tubes in a SMART reactor. It was found that vibrational characteristics of larger coil diameter helical tubes are different from smaller coil diameter tube (142 mm). The natural frequencies of the smaller ones were reduced by increasing helix angle. Natural frequencies of doubled length tube were also calculated. The difference in natural frequencies between the first order and the last order modes of the longer tube was found to be less than one third of the corresponding frequency difference in the original tube. It was also found that when the helix angle of a tube with 8 supports and coil diameter smaller than 100 mm is larger than 80°, the natural frequencies of the tube are lower than 700 Hz and this maybe induce fretting from the fluid through the tube.
Related Topics
Physical Sciences and Engineering Energy Energy Engineering and Power Technology
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