Free and forced vibration of submerged ring-stiffened conical shells with arbitrary boundary conditions

摘要: Abstract An analytic approach is presented to analyze free and forced vibration of submerged ring-stiffened conical shell with arbitrary boundary conditions at low frequencies. According the junctions shell-stiffener, firstly divided into multiple substructures, e.g. segments stiffeners. To take account fluid loading, are more narrow strips those approximately considered as local cylindrical shells. Then, Flugge theory used describe motion displacement functions expressed power series. Instead utilizing smeared out method, ring stiffeners treated discrete members equations annular plate, rather than curve beam, adopted rectangular cross-section. Lastly, continuity adjacent substructures assemble final governing equation. Comparisons results present method in literature and/or calculated by finite element show validity method. The effects conditions, loading on studied. external point force also discussed.