Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8067173 | Annals of Nuclear Energy | 2018 | 5 Pages |
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 (142â¯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 100â¯mm is larger than 80°, the natural frequencies of the tube are lower than 700â¯Hz and this maybe induce fretting from the fluid through the tube.
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Authors
Xin Guo, Jun Cai, Yandong Wang,