Sloshing of Liquid in a Cylindrical Tank with Multiple Baffles and Considering Soil-Structure Interaction

In this study, the liquid sloshing in a cylindrical tank considering soil–structure interaction and undergoing horizontal excitation is investigated analytically. Multiple rigid annular baffles are positioned on wall to mitigate sloshing. Firstly, combined with subdomain partition method for sloshing, complex domain partitioned into simple subdomains single condition boundary. Based continuity conditions of velocity pressure as well linear equation free surface, exact solution convective potential derived high accuracy. By yielding similar hydrodynamic shear moment those original system, mechanical model developed describe continuous parameters given detail. Then, by means least squares approach, Chebyshev polynomials utilized fit impedances circular surface foundation. A lumped parameter employed represent influences soil superstructure. Finally, using substructure method, coupling soil–tank system simplify dynamic analysis. Comparison investigations carried out verify effectiveness model. Detailed characteristics responses analyzed regard different baffle sizes positions parameters, respectively. The novelty present study that an equivalent analytical soil–foundation–tank–liquid multiple firstly obtained it allows behaviors be computation efficiency acceptable