API 650 gives equations for the periodic times for the impulsive and convective components of a liquid filled tank as the tank is not the governing component. However API 650 does not give the equations for an empty tank. Does anyone know where equations may be found for this case. Example outer tank of a single containment tank?
Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Periodic time for empty tank for seismic analysis
- Thread starter DSB123
- Start date
Generally, tanks aren't even checked for seismic loading when empty, which is why you don't find much information on the topic. The simplest solution would be to treat the tank as "rigid", which would just involve omitting the liquid terms from the different API equations. You could also calculate an impulsive period for an empty tank by treating it as a cantilever beam fixed at the base, and applying Rayleigh's or Rayleigh/Ritz method, etc. (For many tanks, shear deflection in the shell will be significant and should not be neglected.)
- Status
Similar threads
- Question
- Locked
- Question
- Question
- Locked
- Question
