Noise reduction effect detection method of ship bow acoustic platform sound-absorption/insulation material

A technology of material structure and detection method, which is applied in the direction of sound-emitting devices, radio wave measurement systems, instruments, etc., can solve problems such as errors, achieve the effect of making up the gap and improving the level of design and application

Active Publication Date: 2019-01-15
HARBIN ENG UNIV
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Problems solved by technology

[0004]At present, traditionally, the evaluation of the noise reduction effect of the sound-absorbing and insulating material structure of the bow acoustic platform is mainly through software simulation, and model tests are rarely used. Although this method can better ...

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  • Noise reduction effect detection method of ship bow acoustic platform sound-absorption/insulation material
  • Noise reduction effect detection method of ship bow acoustic platform sound-absorption/insulation material
  • Noise reduction effect detection method of ship bow acoustic platform sound-absorption/insulation material

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Embodiment Construction

[0044] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the present invention will be further described below in conjunction with the accompanying drawings:

[0045] figure 1 It is a flow chart of a method for detecting noise reduction effect of a bow acoustic platform sound-absorbing and insulating material structure;

[0046] figure 2 It is a schematic diagram of the experimental principle of the noise reduction effect of different sound-absorbing and insulating material structures of the bow acoustic platform of the present invention on the self-noise of the bow acoustic platform;

[0047] image 3 A schematic diagram of a bow acoustic platform model without any noise reduction control measures for the present invention;

[0048] Figure 4 It is a schematic diagram of the self-noise reduction control model of the bow acoustic platform for the present invention to only install the sonar baff...

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Abstract

The invention relates to the field of the underwater structure noise control engineering, and specifically relates to a noise reduction effect detection method of a ship bow acoustic platform sound-absorption/insulation material. The method comprises the following steps: establishing a test system in a ship bow acoustic platform, measuring self-noise by directly utilizing a self-array hydrophone installed at an array location through the adoption of a platform self-noise horizontal detection processing method, describing the distribution of the whole sound field in the acoustic platform through thought of average sound energy, computing mean-square sound pressure level at each measurement point in the ship bow acoustic platform by adopting the mean-square sound pressure method, and obtaining the mean-square sound pressure level of the whole sound field in the ship bow acoustic platform by using a formula so as to be used as a data result of the self-noise level in the ship bow acousticplatform. Noise reduction control effects on the ship bow acoustic platform self-noise by different sound-absorption/insulation materials can be directly evaluated, thereby realizing the detection onthe noise reduction effects on the ship bow acoustic platform self-noise by different sound-absorption/insulation materials

Description

technical field [0001] The invention relates to the field of underwater structural noise control engineering, in particular to a method for detecting the noise reduction effect of a bow acoustic platform sound-absorbing and insulating material structure. Background technique [0002] The performance of the sonar system in the ship's bow acoustic platform plays an important role in the combat capability of the surface ship. The acoustic interference encountered by the sonar when it is working is the self-noise in the acoustic platform, which is expressed as the noise level NL item in the sonar equation, and its size directly affects the detection range of the ship's own sonar. Therefore, it is particularly important to take effective control measures to reduce the self-noise in the bow acoustic platform, ensure the normal operation of the sonar system, and test the noise control effect. [0003] Since the self-noise in the bow acoustic platform has the characteristics of mul...

Claims

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Application Information

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IPC IPC(8): G01S7/52G10K11/162
CPCG10K11/162G01S7/52004Y02T90/00
Inventor 靳国永张艳涛叶天贵师康康陈玉坤王雪仁刘志刚林壮李平
Owner HARBIN ENG UNIV
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