Method for correcting distortion of wind pressure signal of wind tunnel experimental pressure measurement model
A technology of wind tunnel experiment and signal distortion, applied in the field of wind tunnel experiment, can solve problems such as wind pressure signal distortion, and achieve the effect of eliminating the effect of distortion
Active Publication Date: 2019-06-18
GUANGZHOU UNIVERSITY
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[0004] The purpose of the present invention is to provide a method for correcting the distortion of the wind pressure signal of the wind tunnel test pressure measurement model, so as to solve the problem of the distortion of the wind pressure signal of the wind tunnel test pressure measurement model in the prior art
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[0052] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.
[0053] Embodiment 1 of the method for correcting the distortion of the wind pressure signal of the wind tunnel test pressure measurement model of the present invention is as follows: Figure 1 to Figure 10 As shown, the method for correcting the wind pressure signal distortion of the wind tunnel experimental pressure measurement model adopts a corresponding correction system to modify the wind pressure signal of the wind tunnel experimental pressure measurement model. The correction system includes a signal generator 1 and a power amplifier connected in sequence. 2. The loudspeaker 3 and the airtight chamber 4 are connected to the pressure scanning valve 9 to be tested through the test pipe 7. The signal generat...
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The invention belongs to the field of wind tunnel experiments and relates to a method for correcting the distortion of the wind pressure signals of a wind tunnel experimental pressure measurement model. According to the method, the length of a test pipeline is measured by a conventional ruler; the bore diameter correction of the test pipeline is realized through a water injection weighing method;according to the measurement of the volume of a pressure scanning valve, two parameters, namely the amplitude ratio and phase of measured data, are compared with theoretical analysis, the weighted calculation of the two parameters is performed, and finally the estimation value of the volume of the pressure scanning valve which is obtained when a coincidence degree is the highest is selected as thereference value of the volume of the pressure scanning valve. According to the method of the invention, experimental analysis and theoretical analysis are combined, on the basis of measuring the length of the test pipeline, correcting the bore diameter of the test pipeline and measuring the volume of the pressure scanning valve, and the distortion of the wind pressure signals of the wind tunnelexperimental pressure model is corrected through Fourier transformation and inverse transformation, and therefore, the distortion of the wind pressure signals can be eliminated.
Description
Technical field [0001] The invention relates to the field of wind tunnel experiments, in particular to a method for correcting the distortion of the wind pressure signal of the wind tunnel experiment pressure measurement model. Background technique [0002] In the field of wind engineering research, it mainly includes three technical means: wind tunnel experiment, numerical simulation and field measurement. The wind tunnel experiment is based on the relative principle of motion. The experimental model or physical object is fixed in the artificial environment on the ground, and the air flow is artificially created. , Obtain experimental data by means of scale and scale, which mainly include two main purposes: pressure measurement and force measurement. [0003] When carrying out the wind tunnel pressure measurement model experiment, the measured wind pressure signal on the surface of the building model is transmitted to the pressure scanning valve through the pipeline. During the tr...
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Inventor 何运成梁启胜李智吴玖荣傅继阳
Owner GUANGZHOU UNIVERSITY