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Tuned liquid damper performance parameter detection method, system, equipment and medium

A technology for tuning liquid damping and detection methods. It is used in the testing of machine/structural components, measuring devices, and vibration testing. It can solve the problems of time-consuming and laborious, difficult to accurately determine performance parameters such as frequency and damping ratio, and large workload.

Active Publication Date: 2020-10-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the above methods, the sine wave frequency sweep method requires multiple sine wave excitation loadings of different frequencies, which is time-consuming and laborious, especially when the high-order modal parameters need to be identified, the workload will be greater and it is extremely uneconomical, and the frequency sweep method is not accurate. Identify the modal parameters of a coupled system
For TLDs with irregular shapes and internal components, it is difficult to accurately determine their performance parameters such as frequency and damping ratio by theoretical analysis and numerical simulation methods.

Method used

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  • Tuned liquid damper performance parameter detection method, system, equipment and medium
  • Tuned liquid damper performance parameter detection method, system, equipment and medium
  • Tuned liquid damper performance parameter detection method, system, equipment and medium

Examples

Experimental program
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Embodiment 1

[0083] This embodiment is a detection method of performance parameters of a tuned liquid damper, based on which the performance parameters of a tuned liquid damper can be detected, such as figure 1 As shown, the method includes the steps of:

[0084] Step 1. Determine the colored noise power spectrum S of the input excitation according to the performance of the test system of the TLD scale model, that is, the performance of the shaking table and the theoretical estimation of the TLD FF (f):

[0085]

[0086] Among them, α and β are coefficients determined by the performance of the vibrating table, where when the vibrating table is loaded by displacement control, α=1, β=-4, when the vibrating table is loaded by acceleration control, α=1, β= 0; f is the frequency variable, a and b are the upper limit and lower limit of the effective bandwidth range of the input excitation, determined by the theoretical estimation of TLD.

[0087] Theoretical estimation of TLD performance re...

Embodiment 2

[0155] This embodiment discloses a detection system for tuning the performance parameters of the liquid damper, such as figure 2 As shown, it includes TLD scale model 1, host computer 2, actuator 3, vibration table 4 and measurement system.

[0156] In this embodiment, the TLD scale model 1 is installed on a vibrating table 4 . In this embodiment, the TLD scale model is based on the TLD prototype structure, according to a certain similar and accurate design, and the manufacturing material can be selected from plexiglass or iron plate. In this embodiment, the specific TLD scaled-scale model and the similarity criterion of the TLD prototype structure can be as shown in Embodiment 1, and will not be repeated here.

[0157] In this embodiment, the measurement system is connected to the host computer to collect the liquid response data in the TLD scale model, and transmit the collected liquid response data to the host computer.

[0158] In this embodiment, the vibrating table is...

Embodiment 3

[0171] This embodiment discloses a computing device, which includes a processor and a memory for storing executable programs of the processor. When the processor executes the program stored in the memory, the tuning of the performance parameters of the liquid damper shown in Embodiment 1 is realized. The detection method is as follows:

[0172] According to the theoretical estimate of the performance of TLD scale model shaking table and TLD, determine the colored noise power spectrum of input excitation; Described TLD scale model is designed and made according to TLD prototype structure;

[0173] Simulation of custom colored noise stimuli for vibration testing based on the colored noise power spectrum of the input stimuli;

[0174] When the shaking table test is carried out under the excitation of customized colored noise, the liquid response data in the TLD scale model is collected through the measurement system to obtain the TLD coupling response signal;

[0175] Decouple t...

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Abstract

The invention discloses a tuned liquid damper performance parameter detection method, system, equipment and a medium. The method includes: firstly, determining a colored noise power spectrum of inputexcitation, simulating customized colored noise excitation for a vibration test, and in the vibration table test process under the customized colored noise excitation, collecting liquid response datain a TLD reduced-scale model through a measurement system to obtain a TLD coupling response signal; and acquiring a decoupled modal response signal based on the TLD coupling response signal, and performing parameter identification on the decoupled modal response signal to obtain the parameter performance of the TLD. According to the method, the TLD performance parameters can be rapidly and efficiently detected, the method has the advantage of small resource occupation amount, the method is not limited by the shape of the TLD and internal components, and the method is suitable for detecting theperformance parameters of the TLD which is irregular in shape and is provided with the internal components.

Description

technical field [0001] The invention relates to a tuning liquid damper in a dynamic shock absorber, in particular to a detection method and system for performance parameters of a tuning liquid damper (TLD). Background technique [0002] Dynamic vibration absorber (DVA) is a passive control device commonly used in wind vibration control of super high-rise buildings, usually including tuned mass damper (TMD) and tuned liquid damper (TLD). Generally, a TLD consists of a tank, a liquid in the tank, and internal components with the function of tuning or increasing damping. The frequency and damping ratio of the TLD are two important performance indicators that engineers focus on. Adjusting the first-order frequency of TLD to be the same as the modal frequency of the structure to be controlled can effectively slow down the structural wind-induced response. Setting the internal components in the TLD can increase the additional damping, so that the TLD can achieve better control e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02G06F17/18G06F17/14
CPCG01M7/02G06F17/14G06F17/18
Inventor 张蓝方谢壮宁张乐乐石碧青江毅
Owner SOUTH CHINA UNIV OF TECH
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