Effects of oscillation amplitude on aerodynamic derivatives

Noda, Minoru; Utsunomiya, H.; Nagao, Fumiaki; Kanda, Makoto; Shiraishi, Nobuo

doi:10.1016/s0167-6105(02)00338-0

Cited by 74 publications

(26 citation statements)

References 1 publication

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“…This is consistent with the representation given in Eq. (1) [18]. In addition to the above-presented convention for flutter derivatives, some other conventions are also used, as shown in [19,20].…”

Section: Bridge Flutter Modelmentioning

confidence: 99%

Identification of flutter derivatives by forced vibration tests

Glumac¹,

Höffer²,

Brčić³

2017

JCE

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Identification of flutter derivatives by forced vibration testsResults of an experimental study related to flutter phenomenon are presented in the paper. Two cross-sections are considered: a rectangular cross-section and a typical symmetric bridge cross-section. Stationary coefficients and instationary flutter derivatives are determined by means of forced vibration tests. The identification technique is presented in detail. Pressure measurements at the centre of the bridge cross-section are also performed. Main wind flow patterns are analysed based on pressure distribution data. Identifikacija parametara treperenja testovima prisilnih vibracija U radu su prikazani rezultati eksperimentalnog istraživanja vezanoga za pojavu treperenja. Promatrana su dva poprečna presjeka: pravokutan i tipičan simetričan poprečni presjek mosta. Posebno su određeni ustaljeni koeficijenti kao i neustaljeni parametri treperenja primjenom testova prisilnih vibracija. U radu je detaljno prikazana postupak identifikacije. Uz to, na središnjem poprečnom presjeku mosta provedena su mjerenja tlakova. Na osnovi raspodjele tlakova analizirane su glavne sheme obstrujavanja vjetra.

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Section: Bridge Flutter Modelmentioning

confidence: 99%

Identification of flutter derivatives by forced vibration tests

Glumac¹,

Höffer²,

Brčić³

2017

JCE

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“…Among the selected cases, Case 1 is associated with a rectangular deck shape (Noda et al, 2003); Cases 2 (Gu et al, 2000) and 3 (Iwamoto and Fujino, 1995) are hexagonal cross-sections (see Table 2 …”

Section: Verification Of the Numerical Methodsmentioning

confidence: 99%

“…In addition, the initial vertical and torsional amplitudes of the bridge deck are selected respectively as 0.25D and 1.3°, which are considered reasonably small to avoid the amplitude effects (Noda et al, 2003).…”

Section: Flutter Derivativesmentioning

confidence: 99%

“…Additionally, based on the experimental results from a coupled verticaltorsional free vibration of a spring-suspended section model, Gu et al (2000) employed a least-square theory Downloaded by [University of Connecticut] at 04:07 13 October 2014 and proposed an identification method to obtain flutter derivatives. Moreover, Noda et al (2003) evaluated the flutter derivatives of thin rectangular cylinders and found that the effect of oscillation amplitudes could be significant.…”

Section: Introductionmentioning

confidence: 99%

“…Based on this approach, Sarkar et al (1992), Iwamoto and Fujino (1995), Gu et al (2000) and Noda et al (2003) extend the concept into practical bridge instability analyses. Since all these studies were carried out by wind tunnel tests, the analyses were limited to certain selected variables that could technically be measured.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation on the aerodynamic instability of a suspension bridge with a hexagonal cross‐section

Fang

Liang

et al. 2007

Journal of the Chinese Institute of Engineers

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The aerodynamic instability of a suspension bridge with a hexagonal cross-section is investigated systematically based on a two-dimensional model. Measurements of the dynamic responses of a sectional bridge model in the cross-wind and torsional directions were firstly carried out in a wind tunnel. The results were used to guide and confirm the execution of parallel numerical simulations. Accordingly, both the experimental and numerical results are used as bases to examine the flow effect as well as the aeroelastic behavior of the bridge in detail.Results show that the numerical predictions of the structural responses agree well with those from the experiments, indicating that the proposed numerical method is capable of predicting the deck motion with good accuracy. Based on the timeseries numerical results, extensive investigations reveal that a hexagonal deck has much better aerodynamic stability performance than a rectangular one. Finally, among the hexagonal decks studied, it is found that one with a 30° side angle leads to the greatest critical flutter speed.

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Motion-Dependent Forces on Streamlined Bridge Girders and Their Influencing Parameters – Observations from Wind Tunnel Buffeting Response Data

Jakobsen

2019

Lecture Notes in Civil Engineering

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Effects of oscillation amplitude on aerodynamic derivatives

Cited by 74 publications

References 1 publication

Identification of flutter derivatives by forced vibration tests

Identification of flutter derivatives by forced vibration tests

Investigation on the aerodynamic instability of a suspension bridge with a hexagonal cross‐section

Motion-Dependent Forces on Streamlined Bridge Girders and Their Influencing Parameters – Observations from Wind Tunnel Buffeting Response Data

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