Non-contact type structural dynamic response measurement method for wind tunnel test

A wind tunnel test and dynamic response technology, which is applied in the testing of machines/structural components, measuring devices, aerodynamic tests, etc., can solve the problems of amplification, misleading actual structural design, construction and even operation, etc., and achieve simple and convenient experimental operation , The test site is concise and clear, and the effect of high integration

Active Publication Date: 2016-05-04
ZHEJIANG UNIV
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Problems solved by technology

If the dynamic measurement error in the wind tunnel is too large or the simulation of the wind field in the wind tunnel is disturbed, then the error w...

Method used

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  • Non-contact type structural dynamic response measurement method for wind tunnel test
  • Non-contact type structural dynamic response measurement method for wind tunnel test
  • Non-contact type structural dynamic response measurement method for wind tunnel test

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Embodiment Construction

[0070] Combined with the case shown in Figure 1 and figure 2 The workflow shown in further illustrates the invention.

[0071] See Figure 1 and figure 2 , the case cited in the present invention is to use a non-contact structural dynamic response measurement system for wind tunnel tests to measure a four-story space rectangular frame fixed in a wind tunnel, and to realize three-dimensional structural dynamic displacement measurements on it to complete the wind tunnel test. The specific implementation steps of the structural dynamic response monitoring in the cave are as follows:

[0072] A. Build a wind tunnel test model and adjust the parameters of the high-speed camera.

[0073] A1. Fix the structure to be tested at a suitable position in the wind tunnel (1), determine the structural measurement points, and start the wind tunnel test non-contact dynamic response measurement system (7);

[0074] A2. Repeatedly adjust the spatial angles of the two high-speed cameras (3 an...

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Abstract

The invention relates to a non-contact type structural dynamic response measurement method for a wind tunnel test. The method includes the following steps that: A, a wind tunnel test model is built, and the parameters of a high-speed camera are debugged; B. a binocular system is calibrated; C, a continuously adaptive mean shift algorithm is adopted to realize a target dynamic tracking task; and D, a multi-structure space three-dimensional dynamic displacement is automatically measured and stored.

Description

technical field [0001] The invention relates to a method for dynamically monitoring and identifying dynamic characteristic parameters of a structure under wind load by using an imaging device. Background technique [0002] Wind load has an important impact on the design, construction and operation of various buildings such as long-span bridges, large-scale space structures, high-rise buildings, towering tower structures, and large-scale cable structures. Under the action of wind load, structures will produce complex dynamic wind effects, which may lead to catastrophic wind-induced damage. For example, catastrophic typhoons may cause cracking and damage to the main body of the structure, and long-term continuous wind-induced vibration may cause fatigue and damage to some parts of the structure, such as nodes and supports, endangering the safety of the structure. Therefore, it is very important to study the wind-induced response of structures under wind loads. Wind tunnel te...

Claims

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Application Information

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IPC IPC(8): G01M9/06G01B11/02G01B11/16
CPCG01B11/02G01B11/16G01M9/06
Inventor 叶肖伟董传智黄铭枫余世策
Owner ZHEJIANG UNIV
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