In present paper,a new type of ring-stiffener,called the ring-stiffener of half-tube,is introduced in pressurized cylindrical shell structures.

Research on stability of ring-stiffened cylindrical shells under various uniform lateral external pressures;

Sound radiation analysis of low order modes from the ring-stiffened cylindrical shells in fluid medium;

Regression analysis of lowest frequency for ring-stiffened cylindrical shell under hydrostatic pressure

Through model test of new high- strength steel conical shell with ring frame,and relevant analysis,it is shown in this paper that the failure of ring-framed conical shell can be traced to the neutral plane on longitudinal section where the structure strength is relatively weak.

Sound radiation of a submerged periodic ring-stiffened cylindrical shell by space-harmonic analysis;

Radiated sound pressure of an infinite periodic ring-stiffened cylindrical shell in fluid field was studied by both theoretical and experimental method.