Hull sonar platform area self-noise forecasting method based on virtual sound source wave superposition

Abstract

The invention discloses a hull sonar platform area self-noise forecasting method based on virtual sound source wave superposition, and belongs to the field of ship overall acoustic design. According to the invention, a virtual sound source construction method is established, a virtual sound source wave superposition technology is introduced into submarine self-noise forecasting, in a condition that the real excitation source information does not need to be mastered, vibration response measured and obtained by a limited number of vibration sensors on a structure near a hull sonar platform is used as input, and a plurality of simple virtual sources are constructed to match limited vibration on the surface of the structure, so that superposition of sound wave fields of the simple virtual sources is just matched with the measured structure vibration, and self-noise generated by the structure vibration can be solved through the constructed simple virtual sources. A small number of monitoring sensors can be matched with normal vibration of the surface of an upper structure within a wide frequency band range, and the problem that the requirement for the number of the sensors is large is solved.

Description

technical field [0001] The invention belongs to the field of overall acoustic design of ships, and more specifically relates to a method for predicting self-noise in a sonar platform area of ​​a ship hull based on virtual sound source wave superposition. Background technique [0002] The main means of underwater detection and identification of modern ships is to use sonar. The detection distance and positioning recognition accuracy of sonar are affected by the performance of the equipment itself and the acoustic environment in which the acoustic array is located. At present, ships of various countries attach great importance to the design of acoustic stealth, especially the level of acoustic stealth of ships in Western countries is already very high, even reaching the level of noise in the ocean environment, and it is difficult to be detected. very important. [0003] Improving the detection ability of sonar can be achieved by improving the design of sonar system and impro...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention proposes a method for predicting self-noise in the sonar platform area of ​​the hull based on virtual sound source wave superposition, thereby solving the problem that the traditional method for solving the integral equation model is complicated and the amount of calculation is large. The calculation efficiency is not high, and the demand for the number of monitoring sensors is large, etc.

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