Direct sound production test device of large-proportion propeller model

A thruster, large-scale technology, used in the testing of machine/structural components, measuring devices, fluid dynamics tests, etc., can solve problems such as the impossibility of the thruster proportion being too large, the effective noise measurement frequency is high, and the low-frequency measurement is difficult. , to achieve the effect of short test cycle, low cost and good repeatability

Active Publication Date: 2016-12-07
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When carrying out the test in the circulating water tank, because the cross-sectional area in the circulating water tank is small, firstly, the proportion of the propeller cannot be too large, and secondly, due to the difficulty of low-frequency measurement, the effective noise measurement frequency band is relatively high

Method used

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  • Direct sound production test device of large-proportion propeller model

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Embodiment 1

[0025] Such as figure 1 As shown, a direct sound test device of a large-scale propeller model, the test device includes two-way tensioned towing equipment, a non-powered ship on the water surface, data acquisition equipment, power cables 6, control and data processing equipment, hydrophones Array 1, propeller model 2, main shaft system, non-watertight casing 3, watertight casing 4, sensor 12, support 11, rigid connector 7, motor 5 and motor vibration damping mechanism 13;

[0026] The hydrophone array 1 is a semi-cylindrical surface formed by hydrophones evenly distributed in the direction of the vertical horizontal plane, and the projection on the horizontal plane is a semicircle; the size of the propeller model 2 is the same as that of the actual marine propeller The ratio is 1:10;

[0027] The non-watertight casing 3 is made of a composite material with a high damping coefficient; the watertight casing 4 is made of steel with a thickness of 15mm, and damping materials are ...

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Abstract

The invention relates to a direct sound production test device of a large-proportion propeller model, and belongs to the technical field of underwater vehicle propeller noise control. The device comprises two-way tensioning drag equipment, a water-surface unpowered ship, data acquisition equipment, a power cable, control and data processing equipment, a hydrophone array, the propeller model, a main shaft system, a non-watertight shell, a watertight shell, a sensor, a supporting part, a rigid connecting part and a motor. Water-surface unpowered chip parameters, main shaft system parameters, motor parameters and two-way tensioning drag equipment parameters are determined according to the needed maximum thrust, dimension, weight, power and rotating speed of the propeller model; when the propeller model is not installed, the noise of a system is tested; a clutch is disconnected, and the no-load noise of the motor is tested; the test device is rectified according to the test result till test demands are met. The test device is good in test result repeatability, short in test period and low in cost.

Description

technical field [0001] The invention relates to a direct-sounding acoustic test device for a large-scale propeller model of an underwater vehicle, and belongs to the technical field of noise control of underwater vehicle propellers. Background technique [0002] The underwater propeller noise is one of the main objects of concern in the noise control of underwater vehicles. It includes the direct sound of the propeller and the sound radiation that excites the hull. Among them, the direct sound of the propeller is decisive, because the sound radiation generated by the propeller arousing the hull is closely related to the unsteady force generated by the propeller, and the unsteady force can also be obtained from the direct sound of the propeller according to the dynamic force and sound. Radiation relations are obtained indirectly. There are generally two technical approaches for the direct sounding test of propellers. One is carried out with actual ship test, and the other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 孙国仓陈明邓海华汪利华如南
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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