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Downburst wind field simulation test device and method based on boundary layer wind tunnel

A technology of wind field simulation and test device, which is applied in measurement device, aerodynamic test, and test of machine/structural components, etc., can solve the problems of unfavorable bridge and building structure model wind tunnel test, small size, etc.

Pending Publication Date: 2020-12-04
HUNAN UNIV
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Problems solved by technology

[0004] To sum up, at present, the experimental simulation research of downburst wind field mainly focuses on transmission line towers and building structures, while there are relatively few experimental studies on the impact of downburst on bridge structures; Most of the simulated wind field scale ratios are too small, which is not conducive to carrying out wind tunnel tests on bridge and building structure models

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  • Downburst wind field simulation test device and method based on boundary layer wind tunnel
  • Downburst wind field simulation test device and method based on boundary layer wind tunnel
  • Downburst wind field simulation test device and method based on boundary layer wind tunnel

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with drawings and embodiments.

[0033] Such as Figure 1 to Figure 5 As shown, a downburst wind field simulation test device based on a boundary layer wind tunnel includes a bottom frame 1, two side frames 2 and a top frame 3 arranged side by side, and the bottom frame 1, side frames 2 and top frame 3 It constitutes a detachable hollow rectangular frame structure. A group of opening and closing plates 4 arranged opposite to each other are arranged at the rear of the frame. The opening and closing plates 4 are welded and formed by square steel pipes. One end of each opening and closing plate 4 is hinged to the corresponding side frame 2. The other end of the opening and closing board 4 controls its horizontal opening and closing through the driving system 5, and the windward side of the opening and closing board 4 can fix a smooth wooden board, and it moves through the opening and closing under the act...

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Abstract

The invention discloses a downburst wind field simulation test device and method based on a boundary layer wind tunnel, wherein the device comprises a bottom frame, a side frame and a top frame whichform a detachable hollow frame structure, and the rear part of the frame is provided with a group of opening and closing plates which are oppositely arranged at the left and right sides and are controlled by a drive system. The group of opening and closing plates and the hollow part of the frame form an air duct, and an inclined plate with adjustable height and inclination angle is transversely arranged in the air duct; by changing the opening and closing and the opening and closing angle of the opening and closing plate and changing the height and inclination angle of the inclined plate, a downburst wind profile and a downburst transient wind speed are simulated in a boundary layer wind tunnel. According to the invention, the problem of carrying out bridge model wind-induced response testresearch under the action of downburst in a boundary layer wind tunnel is solved.

Description

technical field [0001] The invention relates to the technical field of bridge and structural wind engineering tests, in particular to a downburst wind field simulation test device and method based on a boundary layer wind tunnel. Background technique [0002] A downburst is a linear gale generated by a local strong downdraft in a thunderstorm cloud after reaching the ground. The wind speed reaches its maximum near the ground, and it is sudden, localized and strongly non-stationary. Because the downburst produces a downdraft that dives down from a high altitude at a very high speed and forms a huge energy near the ground, which poses a huge threat to the safety of aircraft navigation, building structures, and bridge structures. Therefore, the characteristics of downburst wind and its It is of great significance to study its influence on engineering structures. Due to the suddenness and locality of downbursts, it is difficult to observe downburst wind samples on site, and the...

Claims

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Application Information

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IPC IPC(8): G01M9/00G01M9/02
CPCG01M9/00G01M9/02
Inventor 刘志文辛亚兵陈以荣陈政清
Owner HUNAN UNIV
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