Added mass for bouyancy in Dynamic Analysis

Hi everyone,

Could someone explain me how SACS consider bouyancy mass their dynamic analysis? In Dynpac tutorial (§2.3.1), it said "For structures immersed in fluid, the added or virtual mass and the mass of entrapped fluid ca nbe generated automatically", does it mean buoyancy is considered as a added mass?

Also, please let me know if there is somewhere we can find the formulas for above caclulations.

Thank you in advance,

Anthony