A Novel Test Method for Aerodynamic Coefficient Measurements of Structures Using Wind Generated by a Moving Vehicle

Li, S.; Liang, Jing; Zheng, Song; Jiang, Nan; Liu, L.; Guo, Pan

doi:10.1007/s40799-019-00310-6

Cited by 10 publications

(7 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, peak truck-induced pressure is equivalent to a corresponding pressure from a wind that is almost three times less than the truck speed [27]. Nevertheless, trucks may produce wind gusts at frequencies close to dominant frequencies of masts leading to oscillations [18,28,29].…”

Section: Categories Of Wind Loadsmentioning

confidence: 99%

A Framework for Vibration Attenuation in Traffic Mast Arm Structures under Wind Loads

2021

View full text Add to dashboard Cite

Traffic signals and information signs play a vivid role in maintaining safe travel by guiding drivers on highways and urban roads. Traffic mast arm structures are susceptible to vibrations induced by wind loads. Fatigue-induced failure is common in these structures. However, it is crucial to ascertain the functionality of signal support structures. This paper lays the foundation for a fully computational framework to model and mitigate wind-induced vibrations in traffic lighting support structures by conducting computational fluid dynamics (CFD) simulations, dynamic modeling, and damping enhancement. We validated the CFD simulations by aerodynamic testing. The dependence of flow pattern and aerodynamic loads on Reynolds number reveals the importance of full-scale CFD with large eddy simulation for wind load estimation on mast arm structures. Distributed tuned mass dampers were created by employing available weights of lighting boxes. The results show that distributed tuned lighting boxes are effective for vibration suppression. Besides, damping enhancement can significantly reduce vibration-induced stresses and hence extend the fatigue life. The proposed mitigation technique promises to save construction costs and improve the safety of the traveling public. The procedure followed for creating time histories of wind loads integrated with finite element modeling applies to other vibration lessening techniques for potential inclusion in the AASHTO standard.

show abstract

Section: Categories Of Wind Loadsmentioning

confidence: 99%

A Framework for Vibration Attenuation in Traffic Mast Arm Structures under Wind Loads

2021

View full text Add to dashboard Cite

show abstract

“…The two pressure sensors were connected to the total pressure and static pressure holes of the pitot tube to obtain the total pressure and static pressure of the wind field generated by the moving vehicle. The dynamic pressure was converted to the reference wind speed by using the Bernoulli formula [31], and the static pressure could also be used as the reference static pressure for the dimensionless wind pressure coefficient. The sampling frequency of the acquisition system of high frequency dynamic wind pressure was 909 Hz.…”

Section: Equipment and Data Acquisition Systemmentioning

confidence: 99%

“…In addition, in order to improve the accuracy of the wind tunnel test, many scholars have conducted in-depth studies on the boundary layer effect of the wind tunnel test [29]. Li et al proposed a new test method for structural wind resistance research using wind generated by a vehicle moving at a constant speed on the basis of the principle of relative kinematics, which is also called the transiting test for short [30,31]. As a new structural wind resistance research method, the transiting test has practical applications in building the wind pressure coefficient [30], the structural aerodynamic coefficient [31,32], the galloping of iced conductors [33], passive simulation of the wind profile [34], and aerodynamic performance of the wind turbine airfoil.…”

Section: Introductionmentioning

confidence: 99%

“…The Reynolds number effect and the effect of end plates had been analyzed in the previous studies related to the transiting test. It is found that the transiting test method, for measuring the aerodynamic coefficients of the triangular prism on the straight highway, is not sensitive to the Reynolds number effect [31] and requires end plates which meet certain size requirements [32]. Considering that natural wind is ubiquitous in the external environment, it is necessary to study the effect of natural wind on the transiting test.…”

Section: Introductionmentioning

confidence: 99%

“…This research was based on the verification of the aerodynamic transiting test of a triangular prism structure, which uses the test device shown in Figure 1 [31,32]. The Zhengzhou Ring Expressway (G3001) in China was selected as the test route.…”

Section: Introduction Of the Test And Modelmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Natural Wind on the Transiting Test for Measuring the Aerodynamic Coefficients of Structures

Zhu

Liu

et al. 2021

Symmetry

View full text Add to dashboard Cite

The aerodynamic coefficients transiting test is a new method for measuring the structural aerodynamic coefficients using the wind generated by a moving vehicle. However, the effect and correction of natural wind on the transiting test has not been studied. Hence, in this study, the investigation of the aerodynamic force and pressure measurements on a special triangular prism model is simulated through the transiting test under different natural wind conditions for 30° and 90° angles of wind incidence. Force and pressure measurement results in the transiting test are used to describe and explain the effect of natural wind in the range of 0–3.0 m/s on the aerodynamic coefficients of the triangular prism qualitatively and quantitatively. The results show that the driving wind field of the vehicle, aerodynamic force coefficient, and aerodynamic pressure coefficient are significantly influenced by strong natural wind greater than 1.71 m/s, which must be considered and so it is recommended that the structure aerodynamic coefficients transiting test should be conducted under the condition that the natural wind is less than 1.71 m/s. In addition, the method of two-direction round-trip measurement is proposed to modify the effect of natural wind on transiting tests.

show abstract

Investigation of the Transiting Test Method for the Aerodynamic Performance of Vertical Axis Wind Turbine Using Wind Generated by a Moving Vehicle

Liang

et al. 2021

Exp Tech

View full text Add to dashboard Cite

A Novel Test Method for Aerodynamic Coefficient Measurements of Structures Using Wind Generated by a Moving Vehicle

Cited by 10 publications

References 49 publications

A Framework for Vibration Attenuation in Traffic Mast Arm Structures under Wind Loads

A Framework for Vibration Attenuation in Traffic Mast Arm Structures under Wind Loads

Effect of Natural Wind on the Transiting Test for Measuring the Aerodynamic Coefficients of Structures

Investigation of the Transiting Test Method for the Aerodynamic Performance of Vertical Axis Wind Turbine Using Wind Generated by a Moving Vehicle

Contact Info

Product

Resources

About