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Water-landing load test device and method for water surface aircraft model under fixed posture

A load test and aircraft technology, applied in the direction of measuring devices, fluid dynamics tests, machine/structural component testing, etc., can solve the problems of difficult and unsubdivided detailed design of water surface aircraft

Inactive Publication Date: 2019-04-12
CHINA SPECIAL TYPE FLIER RES INST
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  • Abstract
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  • Application Information

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Problems solved by technology

When designing the structure, it is necessary to provide load input, which requires consideration of the influence of these factors on the water load. At present, the aviation regulations and advisory manuals do not link these influence factors with the water load coefficient, but only give a water load Empirical coefficients, especially the values ​​of water load coefficients under different wave heights without subdivision
Ignoring the use restrictions and operating environment of the aircraft, only a rough empirical coefficient is used for the calculation of its water landing load, which brings many difficulties to the detailed design of my country's water surface aircraft

Method used

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  • Water-landing load test device and method for water surface aircraft model under fixed posture
  • Water-landing load test device and method for water surface aircraft model under fixed posture
  • Water-landing load test device and method for water surface aircraft model under fixed posture

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Embodiment Construction

[0029] The specific implementation manner of the present invention will be described in detail in conjunction with the summary of the invention and the accompanying drawings.

[0030] The water surface vehicle model water landing load test device under a fixed attitude includes a water surface vehicle model 1, and the water surface vehicle model 1 is arranged under the hydrodynamic high-speed test trailer 3; the top of the water surface vehicle model 1 is connected to the transfer aluminum plate 5 through the angle adjustment device 2, The lower part of the upper transfer aluminum plate 5 is connected with the lower transfer aluminum plate through the screw rod 6; the lower transfer aluminum plate 5 is threadedly connected with the collar 23, and the collar 23 is connected with the carbon tube 22 arranged inside the fuselage; the angle adjustment device 2 can adjust the water surface The attitude angle of the aircraft model 1, after adjusting the water surface aircraft model 1 ...

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Abstract

The invention discloses a water-landing load test device and method for a water surface aircraft under a fixed posture. The water-landing load test device and method for the water surface aircraft under the fixed posture aims at the accurately predicted difficulty that the water-landing load of a current water surface aircraft, and is used for the fine evaluation of the water-landing load in the fixed state of the water surface aircraft. The method can ensure that a certain parameter of the model remains unchanged in the water-landing process, the influence of a model attitude angle, the horizontal velocity, the vertical velocity and wave parameters on the water-landing load is studied, and the influence of the aerodynamic lift on the water-landing load on the water surface is studied by means of unloading. During testing, measurement data of an acceleration sensor is used for accurately analyzing the water-landing load, and a distribution region and a distribution rule of the pressurein the bottom of the model are analyzed by using measurement data of a pressure sensor, and a load factor and pressure distribution produced by the model in any of the poses which may occur and sea conditions which may occur are accurately predicted.

Description

technical field [0001] The invention relates to the test field of water surface aircraft (seaplane, amphibious aircraft, ground effect aircraft), and specifically belongs to a water surface aircraft model water landing load test device and a test method under a fixed attitude. Background technique [0002] The water landing load of a surface vehicle is the main load condition that restricts its structural integrity and operational safety. The water landing load is directly related to the realization of the aircraft's light structure, long life and large payload, and is an important technical basis for the development of high-performance surface aircraft. At present, the main problem faced by my country's surface aircraft is that the existing calculation methods for surface loads are too extensive and cannot meet the needs of the refined design of surface aircraft; Due to the inaccurate prediction of the water landing load of the surface aircraft, the conservativeness in the ...

Claims

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Application Information

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IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 胡奇王明振许靖锋孙丰罗朋史圣哲
Owner CHINA SPECIAL TYPE FLIER RES INST
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