Transients in shell-liquid systems and echoes in liquid from deformable shells have been studied. A separate section is devoted to problems of hydrodynamics of blood circulation related to biophysics. The behavior of shells in a continuous gas flow (divergence, flutter in a pre- and supersonic gas flow) and in stall currents (buffeting, aeolian oscillations, pitching) is investigated. The effect of atmospheric turbulence on engineering structures is considered. An overview of numerical and experimental methods in aero- and hydroelasticity is given. Inverse aeroelasticity problems related to identification of system parameters and external impacts are investigated.