Modal analysis for unanchored tank
Modal analysis for unanchored tank
(OP)
Hi
I'm trying to model an unanchored storage tank using FE software Abaqus. I wanna run a modal analysis and find out the frequencies for main impulsive and convective modes. However, I need some analytical equations for these two in order to verify my results. Is there any design code or scientific paper which could help me check my analysis?
I'm trying to model an unanchored storage tank using FE software Abaqus. I wanna run a modal analysis and find out the frequencies for main impulsive and convective modes. However, I need some analytical equations for these two in order to verify my results. Is there any design code or scientific paper which could help me check my analysis?
RE: Modal analysis for unanchored tank
https://pdfs.semanticscholar.org/9351/cd259d0ae432...
He references a paper by Veletsos which is the main reference for the impulsive period.
If you have a current API-650, it includes formulas for both impulsive and convective periods as well.
RE: Modal analysis for unanchored tank
RE: Modal analysis for unanchored tank
I don't recall seeing anything on change in period with significant uplift. I would think somebody has looked into that, but not a standard design consideration.