Analysis and Experimental Research on Vibration Characteristics of Pressure Shell Structure.

The vibration and sound radiation characteristics of the submarine pressure hull structure are important performance indicators for the acoustic design of the submarine structure. In this paper, the spectral element method is used to analyze the vibration of the shell structure. Combined with the periodic structure theory, the theoretical calculation method of the periodic ribbed shell structure is deduced, and the analytical method that can be used to calculate the vibration of the pressure shell structure is established. The feasibility of applying the spectral element method to the vibration calculation of the pressure shell structure is verified by comparing the analytical calculation and the finite element simulation. The vibration characteristics test experiment of the actual submarine pressured hull structure is carried out. The results show that the theoretical analysis is correct. Highlights: The vibration and sound radiation characteristics of the submarine pressure hull structure have an important influence on the radiated noise of the submarine. A theoretical analysis method of vibration characteristics of pressure hulled based on spectral element method and periodic structure theory is proposed. The experimental study on vibration characteristics and active control of line spectrum of the pressure hull is carried out. [ABSTRACT FROM AUTHOR]