Finite element modeling method of underwater vehicle wedge ring structure

Abstract

The invention provides a finite element modeling method of an underwater vehicle wedge ring structure. Firstly, the wedge ring connection structure is simplified and grid dividing is performed; secondly, test data are used for obtaining the equivalent elastic modules of the simplified wedge ring structure; finally, an equivalent model of the wedge ring connection structure is set up. According to the finite element modeling method of the underwater vehicle wedge ring structure, the wedge ring connection structure is simplified, a finite element model of the wedge ring connection structure is set up, the modal test data of the wedge ring connection structure are used, an elastic model of an equivalent wedge ring is determined, and therefore the finite element model with high precision of the underwater vehicle wedge ring connection structure is obtained. The method is easy to implement, easy to operate, capable of effectively improving the modeling precision of the underwater vehicle wedge ring connection structure, improving the vibration noise forecasting accuracy of an underwater vehicle and guiding the acoustic design of the underwater vehicle structure.

Description

technical field [0001] The invention relates to the technical field of vibration reduction and noise reduction for underwater vehicles, in particular to a finite element modeling method for wedge ring structures of underwater vehicles. Background technique [0002] The connection between sections of underwater thermodynamic vehicles generally adopts wedge ring connection. The wedge ring connection method can not only meet the requirements of connection strength, but also has the advantages of reliable connection, convenient loading and unloading, etc. The outer surface of the connection is smooth, which is conducive to reducing resistance and Noise, and the structure of the connection is compact, and the additional weight of the connection is light. [0003] Wedge-ring connection is to use two open rings with wedge-shaped surfaces to generate axial tension when they move relative to each other in the circumferential direction to connect two adjacent compartments of the under...

AI Technical Summary

Problems solved by technology

[0004] There are many components in the wedge-ring connection structure, and the dynamic characteristics are complex, which has a great influence on the overall dynamic characteristics of the underwater thermodynamic vehicle. It is necessary to simplify the wedge-ring connection structure and establish its limited structure when analyzing the overall structure of the vehicle. How to combine and simplify the finite element model of the overall structure of the aircraft is the key to the finite element modeling of the overall structure of the aircraft, which directly affects the accuracy of the overall dynamic performance prediction of the aircraft

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