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Wind vibration realizing method for double coupled system with consideration high-frequency base force balance test

A realization method and dual-coupling technology, applied in the direction of aerodynamic test, machine/structural component test, measuring device, etc., can solve complex problems, achieve accurate base bending moment response, accurate equivalent static wind load, The effect of accurate modal parameters

Active Publication Date: 2018-12-21
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

The wind load of the structure is far more complicated than the earthquake load. Even for the three-dimensional structural wind vibration analysis using HFFB technology, its generalized force depends on the two aerodynamic overturning moments and torques of the structural foundation. The correlation between the three The strength depends on the shape of the building, the wind speed and direction, and the interference of surrounding buildings. It is impossible to have a complete correlation between them. Using SCQC may lead to conservative results

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  • Wind vibration realizing method for double coupled system with consideration high-frequency base force balance test
  • Wind vibration realizing method for double coupled system with consideration high-frequency base force balance test
  • Wind vibration realizing method for double coupled system with consideration high-frequency base force balance test

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Embodiment 1

[0021] A dual-coupling system for high-frequency base balance tests and its wind-vibration realization method, such as figure 1 , the dual coupling system includes two coupling systems of a balance model system and a structural prototype system, and the wind vibration realization method of the dual system includes the following steps:

[0022] Step 1: Obtain the voltage signal by wind tunnel test measurement;

[0023] Step 2: Obtain the initial base load signal through static calibration;

[0024] Step 3: Obtain the final base load signal through dynamic calibration;

[0025] Step 4: Output the calibrated signal to obtain the collected signal;

[0026] Step 5: Scale down the collected signal to obtain the base load of the prototype;

[0027] Step 6: Obtain the modal distribution coefficient matrix from the modal analysis results;

[0028] Step 7: Combined with the modal distribution coefficient matrix, the base aerodynamic force is obtained;

[0029] Step 8: Obtain the ba...

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Abstract

The invention discloses a wind vibration realizing method for a double coupled system with consideration a high-frequency base force balance test. With a second-order blind identification technology based on a complex mode theory, decoupling of a coupled measurement signal is realized; and reliable parameter recognition is carried out on a separated signal by using a Bayesian spectral density method based on all-aerodynamic force simulation, so that a separation / mixing matrix, an inherent frequency and a damping ratio of a BMS and thus correction of a distorted aerodynamic signal is realized.On the basis of power calibration, a wind effect and equivalent static wind load calculation method considering the influence of a three-dimensional coupling effect of a super high-rise building structure is established by using a harmonic excitation method, so that defects of the HFFB are overcome to a certain extent and the result becomes real and accurate.

Description

technical field [0001] The invention relates to the field of test technology improvement, in particular to a wind vibration realization method of a double coupling system considering a high-frequency base force balance test. Background technique [0002] High frequency base force balance (HFFB) technology is one of the main technical means to evaluate the wind effect of super high-rise buildings. Most super high-rise buildings have the characteristics that the first two lateral displacement modal frequencies are very close, which may produce significant modal coupling effects (MCE) under wind loads. For the balance model system (BMS) for the wind tunnel HFFB test, MCE will increase the difficulty of aerodynamic distortion signal correction; for the structural wind vibration analysis of the prototype, ignoring the influence of MCE may significantly affect the structural wind vibration response and wind-induced load calculation results. [0003] The existing processing metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06
Inventor 张乐乐谢壮宁余先锋石碧青
Owner SOUTH CHINA UNIV OF TECH
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