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Low-noise high-navigational-speed large-depth underwater unpowered upwards-floating test platform

A test platform and low-noise technology, applied in underwater operation equipment, transportation and packaging, ships, etc., can solve the problems of poor low-frequency noise reduction effect in the pool, influence and other problems, and achieve simple and reliable processing and installation methods. The effect of strong adaptability and convenient disassembly and assembly

Inactive Publication Date: 2015-10-21
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The general underwater test platform adopts the form of towed or self-propelled model, but for the test platform with underwater low-frequency noise as the test content, the low-frequency free sound field test results cannot be obtained when the pool tow method is used due to the poor low-frequency noise reduction effect of the pool If the external towing method is used, the noise caused by the towing system including the vibration of the cable and the mechanical noise of the winch will have a great impact on the test results; if the self-propulsion model is used, the noise of the power system often exceeds the magnitude of the flow-induced noise

Method used

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  • Low-noise high-navigational-speed large-depth underwater unpowered upwards-floating test platform

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] A low-cost, low-noise, high-speed and deep-water floating test platform figure 1 , including: the bow end 1 of the metal outer shell, the parallel midship of the metal outer shell 2, the steel pressure-resistant hollow floating ball 3, the lightweight floating ball outer frame 4, the electronic cabin 5, and the stern of the metal outer shell 6 , the stern bearing rod 7, the electronic cabin cup-shaped pipe joint 8, the stern configuration block 9, the release device 10, the weight 11, and the protection rope 13. A number of floating balls 3 are combined with a light floating ball outer frame 4 to form a buoyancy device, which provides floating force for the entire test platform. The bow end 1, the parallel midship 2 and the stern 6 of the metal outer shell form an outer shell with low resistance and low noise, and the object to be tested (such as an appendage structure, etc.) can be installed on the outer shell for testing.

[0032] There are water-permeable air holes ...

Embodiment 2

[0053] Implementation example 2, on the basis of embodiment 1, the bow end 1 is refitted with different line-type structures and then tested, so that the comparison of near-field noise and far-field noise under different line types can be realized.

Embodiment 3

[0054] Implementation Example 3, on the basis of Example 1, a stabilizer is installed on the stern to make the platform more stable when floating, and less likely to be disturbed by test objects such as appendages.

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Abstract

The invention provides a low-noise high-navigational-speed large-depth underwater unpowered upwards-floating test platform. The low-noise high-navigational-speed large-depth underwater unpowered upwards-floating test platform comprises a non-watertight outer shell, a floating force device, an electronic cabin, a release mechanism and a stern force bearing rod, wherein the floating force device is composed of a plurality of pressure withdrawing hollow floating balls and a floating ball outer frame; the non-watertight outer shell is composed of a bow end, a parallel middle body and a stern; the multiple pressure withdrawing hollow floating balls are fixedly embedded into the floating ball outer frame, and the floating ball outer frame is fixed to the interior of the parallel middle body; the electronic cabin is fixed to the interior of the stern through a flange, a sensor and a data collecting device are loaded inside the electronic cabin, and a depth sensor is loaded outside the electronic cabin; one end of the stern force bearing rod is fixedly connected to the electronic cabin, and the other end of the stern force bearing rod is fixedly connected with the tail end of the stern of the outer shell; and the release mechanism is composed of a weight and a releaser, and the weight is connected with the other end of the stern force bearing rod through the releaser. The test platform can serve as an underwater structure flow-induced near-field or a far-field noise test verification platform.

Description

technical field [0001] The invention belongs to the technical field of hydrodynamic noise control of underwater vehicles, and in particular relates to a low-noise, high-speed and large-depth underwater unpowered floating test platform. Background technique [0002] When the aircraft is sailing in the air or underwater, due to the influence of fluid excitation, it will often produce strong vibration and emit a large low-frequency sound, which not only destroys its own concealment, but also damages the structural parts. The low-cost, low-noise, high-speed floating platform is of great significance to verify the design method and improve the control measures of the fluid-induced vibration and noise of the aircraft. [0003] The general underwater test platform adopts the form of towed or self-propelled model, but for the test platform with underwater low-frequency noise as the test content, the low-frequency free sound field test results cannot be obtained when the pool tow met...

Claims

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Application Information

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IPC IPC(8): B63C11/52
Inventor 孙国仓黎雪刚郑国垠华如南徐俊刘宏汪利
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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