Forced Vibration of conical-cylindrical shell with T-shaped stiffener

A conical-cylindrical shell with a T-shaped stiffener has wide application in aerospace and ocean engineering. The forced vibration characteristics of a conical-cylindrical shell with a T-shaped stiffener are carried out here; an external point-driven force is applied, and the vibrational velocity, self / mutual resistance, and distribution of external surface velocity are analyzed. Numerical results show that the vibration response of the conical-cylindrical shell is much bigger at the driven frequencies of 222 Hz, 306 Hz, and 346 Hz, which indicates that the resonance phenomenon occurred. The valley frequency points from both self and mutual resistance of the conical-cylindrical shell are the same. Resistance is inversely proportional to vibration velocity, so the same peak frequency points for structural vibration will lead to the same valley frequency points for resistance curves. At the resonance-driven frequency point, structural vibration is mainly determined by a certain modal shape. These conclusions may help to give a better design of a conical-cylindrical shell in engineering.