Quantitative calculation method and system for vibration response of complex composite shell structure in fluid medium

Abstract

The invention discloses a method and system for quantitatively calculating the vibration response of a complex combined shell structure in a fluid medium, wherein the method includes the following steps: obtaining structural parameters and excitation parameters of the combined shell system in the fluid medium; according to the obtained structural parameters and excitation parameters, Collocate points on the surface of the combined shell along the direction of the generatrix, use the fine integration method to calculate the field transfer matrix and point transfer matrix between the collocated points of the combined shell system, and calculate the external force vector; according to the boundary conditions at both ends of the combined shell system and the structural continuity conditions, establish The dynamic model of the fluid medium-combined shell system; the vibration response of the fluid medium-combined shell system is obtained by solving the Moore-Penrose generalized inverse matrix. Based on fine integration and transfer matrix method, the invention can quantitatively calculate the vibration response of the complex combination shell in the fluid medium which is generated by external excitation, and provides reference and basis for the analysis of the vibration characteristics of the underwater vehicle.

Description

technical field [0001] The invention relates to the technical field of vibration response analysis of ship structures, and specifically designs a quantitative calculation method for the vibration response of complex combined shell structures based on fine algorithms. Background technique [0002] The vibration and noise of ships, especially underwater vehicles, has always been a research hotspot at home and abroad. On the one hand, it will reduce the comfort of the ship, on the other hand, it will also affect the safety of the ship, and it will also damage the performance of instruments and equipment. Of course, it will also endanger the ship. acoustic invisibility. With the increase in power, speed and weight of ships, the problem of vibration and noise has become increasingly prominent. In addition, with the continuous improvement of the comfort of the crew and passengers, the problem of vibration and noise has become an urgent problem to be solved. Therefore, in the stru...

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Problems solved by technology

However, these methods are only suitable for the combination of simpler structures, and there is no influence of fluid-structure interaction of the fluid medium around the structure, so the above methods cannot simulate the vibration response of ships, especially underwater vehicles.

There are no reports on the calculation and processing methods of complex composite shell systems including spherical shells, bulkheads and other structures and fluid media.

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