Device and method for testing flow-induced noise of underwater vehicle based on gravity type water tunnel
A technology of underwater vehicles and testing devices, applied in the direction of measuring devices, using electrical devices, transportation and packaging, etc.
Pending Publication Date: 2021-07-09
中国人民解放军92578部队
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[0011] However, the simulation results obtained by calculating the low-frequency flow-induced noise by the FEM-AML method and the mid-high frequency flow-induced noise by the statistical energy method still need to verify the reliability
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[0041] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0042] Such as Figure 1-5 The test device for the flow-induced noise of underwater vehicles based on gravity water tunnels is shown, which is used to measure the wall pressure, vibration acceleration and flow-induced noise of the flow-induced structure under different flow velocities, and then verify the simulation method obtained reliability of the numerical results. The device provides fluid with a stable flow rate through a gravity water tunnel, and uses pressure sensors, acceleration sensors, and hydrophones to measure the wall pressure signal, vibration acceleration signal, and flow-induced noise signal of the test piece, realizing the control of structural parts at different speeds. Analysis of the characteristics and laws of lower wall pressure, vibration acceleration and flow-induced noise. Furthermore, the reliability of the numeri...
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The invention relates to the technical field of acoustic measurement, in particular to a device and a method for testing flow-induced noise of an underwater navigation body based on a gravity type water tunnel. A gravity type water tunnel in the device is provided with a sealing box serving as a working section. The sealing box is located in the reverberation water tank. A hollow test piece is fixedly arranged in the sealing box. The pressure sensor and the acceleration sensor are respectively fixed on the test piece through a first mounting hole and a second mounting hole on the test piece. The test piece is impacted by fluid to generate a flow-induced noise signal. The hydrophone on one side of the reverberation water tank collects flow-induced noise signals. Signals collected by the pressure sensor, the acceleration sensor and the hydrophone are respectively processed by the signal processor to form sampling signals. The signal acquisition instrument collects sampling signals and transmits the sampling signals to the host. Analysis of wall surface pressure, vibration acceleration and flow-induced noise characteristics and laws of the structural member at different navigational speeds is realized, and the reliability of a numerical result obtained in an analogue simulation method is further verified.
Description
technical field [0001] The invention relates to the technical field of acoustic measurement, in particular to a testing device and testing method for flow-induced noise of an underwater vehicle based on a gravity water tunnel. Background technique [0002] When the underwater vehicle is navigating underwater, the moving ship passes through the unstable flow field, which will form coupling vibration between the local structure and the surrounding fluid. Effective energy form, so the turbulent noise will seriously affect the concealment performance of the underwater vehicle. Therefore, exploring the mechanism of generation and propagation of ship's underwater vibration and current-induced noise, as well as its radiation law, will have important practical significance for improving the stealth ability of underwater vehicles. [0003] At present, in the design process of underwater vehicles, the numerical calculation method is usually used to predict the acoustic performance of...
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IPC IPC(8): G01H11/08B63B71/00
CPCG01H11/08B63B71/00
Inventor 王雪仁缪旭弘唐宇航贾地高晟耀周涛卢清亮庞福振李海超
Owner 中国人民解放军92578部队