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Bridge aerodynamics 1

Bridge aeroelasticity 1

Buffeting 1

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Long-span bridges 1

aeroelastic code 1

aeroelasticity 1

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Review of aeroelasticity for wind turbine: Current status, research focus and future perspectives

Pinting ZHANG, Shuhong HUANG

Frontiers in Energy 2011, Volume 5, Issue 4, Pages 419-434 doi: 10.1007/s11708-011-0166-6

Abstract: Aeroelasticity has become a critical issue for Multi-Megawatt wind turbine due to the longer and moreIn this paper, the development of aeroelasticity and aeroelastic codes for wind turbine is reviewed andaeroelastic code for large scale wind turbine: aeroservoelasticity and smart rotor control; nonlinear aeroelasticity

Keywords： wind turbine aeroelasticity aeroelastic code

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A Comparative Assessment of Aerodynamic Models for Buffeting and Flutter of Long-Span Bridges

Igor Kavrakov, Guido Morgenthal

Engineering 2017, Volume 3, Issue 6, Pages 823-838 doi: 10.1016/j.eng.2017.11.008

Abstract:

Wind-induced vibrations commonly represent the leading criterion in the design of long-span bridges. The aerodynamic forces in bridge aerodynamics are mainly based on the quasi-steady and linear unsteady theory. This paper aims to investigate different formulations of self-excited and buffeting forces in the time domain by comparing the dynamic response of a multi-span cable-stayed bridge during the critical erection condition. The bridge is selected to represent a typical reference object with a bluff concrete box girder for large river crossings. The models are viewed from a perspective of model complexity, comparing the influence of the aerodynamic properties implied in the aerodynamic models, such as aerodynamic damping and stiffness, fluid memory in the buffeting and self-excited forces, aerodynamic nonlinearity, and aerodynamic coupling on the bridge response. The selected models are studied for a windspeed range that is typical for the construction stage for two levels of turbulence intensity. Furthermore, a simplified method for the computation of buffeting forces including the aerodynamic admittance is presented, in which rational approximation is avoided. The critical flutter velocities are also compared for the selected models under laminar flow.

Keywords： Buffeting Flutter Long-span bridges Bridge aerodynamics Bridge aeroelasticity Erection stage