Quantitative calculation method and system for vibration response of complicated combination shell structure in fluid medium

Abstract

The invention discloses a quantitative calculation method and a quantitative calculation system for the vibration response of a complicated combination shell structure in a fluid medium. The method comprises the steps of obtaining structure parameters and excitation parameters of a combined shell system in a fluid medium; carrying out point collocation on the surface of the combined shell in a bus-bar direction, calculating filed transfer matrixes and point transfer matrixes between all collocation points of the combined shell system by a fine integration method, and calculating an external force vector; building a dynamical model of a fluid medium-combined shell system according to the boundary conditions and structure continuing conditions of the two ends of the combined shell system; and solving to obtain the vibration response of the fluid medium-combined shell system through an Moore-Penrose generalized inverse matrix. According to the method provided by the invention, the vibration response generated by external excitation in the complicated combination shell system in the fluid medium can be quantitatively calculated, therefore the reference and basis can be provided to the characteristic analysis of the vibration of an underwater vehicle.

Description

Technical field [0001] The invention relates to the technical field of ship structure vibration response analysis, and specifically designs a method for quantitatively calculating the vibration response of a complex composite shell structure based on a fine algorithm. Background technique [0002] Vibration and noise of ships, especially underwater vehicles, has always been a hot research topic 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 also damage the performance of equipment and equipment, and of course it will endanger the ship. The sound invisibility. With the increase in power, speed and light weight of ships, the problem of vibration and noise has become increasingly prominent. In addition, with the continuous improvement of crew and passenger comfort, the problem of vibration and noise has become an urgent problem to be solved. Therefore, in the acoustic design of ship str...

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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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