Method for suppressing a vibration noise of flow-induced hole cavity

The invention provides a method for suppressing a vibration noise of a flow-induced hole cavity. The method comprises the following steps: identifying a broadband noise caused by fluid dynamic interaction between fluids at a hole of a flow-induced underwater vehicle according to a Struhal number; co...

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Bibliographic Details
Main Authors MIAO TIANCHENG, WANG CHUNXU, XIONG JISHI, CHEN ZHIGANG, YUE JIAO
Format Patent
LanguageChinese
English
Published 28.12.2021
Subjects
AIRCRAFT CARRIERS
MINE-LAYING
MINE-SWEEPING
OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS
PERFORMING OPERATIONS
RELATED EQUIPMENT
SHIPS OR OTHER WATERBORNE VESSELS
SUBMARINES
TRANSPORTING
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Summary:The invention provides a method for suppressing a vibration noise of a flow-induced hole cavity. The method comprises the following steps: identifying a broadband noise caused by fluid dynamic interaction between fluids at a hole of a flow-induced underwater vehicle according to a Struhal number; combining a numerical simulation analysis method to forecast a narrow-band noise caused by coupling resonance under the action of a result fluid; designing a flow-induced underwater vehicle pore cavity coupling noise control flow, and providing a mode of reducing the number of open pores or closing the open pores and reducing structural response to control the broadband noise; and controlling the narrow-band noise in the mode that the hydrodynamic oscillation frequency and the resonator characteristic frequency are staggered by more than 15%. The flow-induced hole cavity vibration noise can be recognized, noise suppression is achieved, and therefore a flow-induced abnormal noise of the underwater vehicle is avoided.
Bibliography:Application Number: CN202111244514