Results 181 to 190 of about 394,311 (223)

Parameter Adaptation of Reduced Order Models for Three-Dimensional Flutter Analysis

42nd AIAA Aerospace Sciences Meeting and Exhibit, 2004
The accurate prediction of flutter for large 3-D structures in the transonic flight regime requires the construction of high-fidelity models of the fluid system in order to represent the complex flow characteristics present in this nonlinear regime. The computational expense can be quite considerable when the model is large (many degrees of freedom ...
Thuan Lieu, Michel Lesoinne
openaire   +2 more sources

Case study of three-dimensional aeroelastic effect on critical flutter wind speed of long-span bridges

Journal of Wind Engineering and Industrial Aerodynamics, 2021
Three-dimensional (3-D) aeroelastic effect is known as the main factor that leads to the discrepancy between the critical flutter states predicted by two-dimensional (2-D) deck section and 3-D full structure.
Tingting Ma
exaly   +2 more sources

Three-dimensional nonlinear analysis and wind-tunnel experiment of flutter generated on a rectangular sheet in uniform flow

Journal of Fluids and Structures, 2021
Abstract Flexible sheets are used in many industrial applications. During their manufacturing processes, the coupling of the sheet motion and airflow causes flutter, which can result in severe quality defects. To prevent these defects, a detailed understanding of the fluttering mechanisms and characteristics is essential.
K. Hiroaki, M. Watanabe
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Flow-Induced Vibration and Energy-Harvesting Performance Analysis for Parallelized Two Flutter-Mills Considering Span-Wise Plate Deformation with Geometrical Nonlinearity and Three-Dimensional Flow

International Journal of Structural Stability and Dynamics, 2022
Recently, micro wind energy harvesting devices such as flutter-mills have received considerable attention. The advantage of a flutter-mill over conventional wind power generators is that it can be easily parallelized. They increase the output power, but exhibit highly complex characteristics because the power generation performance depends on the ...
Akio Yamano, Masakatsu Chiba
openaire   +2 more sources

Data-driven stability analysis via the superposition of reduced-order models for the flutter of circular cylinder submerged in three-dimensional spanwise shear inflow at subcritical Reynolds number

Physics of Fluids, 2022
In this paper, we present a novel data-driven theory for the stability analysis of a flow-induced vibration (FIV) system consisting of an elastically mounted circular cylinder submerged in three-dimensional (3D) spanwise shear inflow at a subcritical Reynolds number.
Zhi Cheng, Fue-Sang Lien, Earl H. Dowell, Ryne Wang, Ji Hao Zhang   +4 more
openaire   +2 more sources

Supersonic Flutter Analysis Based on Three-Dimensional Local Piston Theory with Viscous Correction

AIAA Journal
Traditional supersonic flutter analysis methods exhibit inherent limitations owing to their inability to account for viscous effects and failure under nonzero angle of attack (AOA) conditions. This research carried out a three-dimensional (3-D) discretization form of local piston theory (3D-LPT).
Wang Gaozhan, Zhang Xin, Song Chen, Xie Changchuan, An Chao   +4 more
openaire   +2 more sources

Establishment of a three-dimensional multi-modal implicit time-domain method and its application in nonlinear flutter analysis

Physics of Fluids
Three-dimensional (3D) flutter theory is crucial in bridge flutter research. The existing multi-modal time-domain method suffers from low computational efficiency, and there's no clear approach to determine the initial vibration parameters for 3D multi-modal systems.
Jiayong He, Chuanjin Yu, Wanli Yan, Yongle Li, Shanwu Li   +4 more
openaire   +2 more sources

Three-Dimensional Viscous Flutter Analysis of Standard Configuration 10

Volume 5: Turbo Expo 2007, 2007
The results of a three-dimensional (3D) viscous flutter analysis for a compressor stage, Standard Configuration 10, are presented. The unsteady flow simulations were performed by a 3D linearized Navier-Stokes flow solver using the Spalart and Allmaras turbulence model. Significant flow blockage due to corner separation at the hub on the suction surface
Petrie-Repar P.J., McGhee A., Jacobs P.A.   +2 more
openaire   +3 more sources

Three-dimensional nonlinear flutter analysis of long-span suspension bridges during erection

Journal of Zhejiang University SCIENCE, 2003
In this work, the aerodynamic stability of the Yichang Suspension Bridge over Yangtze River during erection was determined by three-dimensional nonlinear flutter analysis, in which the nonlinearities of structural dynamic characteristics and aeroelastic forces caused by large deformation are fully considered. An interesting result obtained was that the
Xin-jun, Zhang, Bing-nan, Sun, Hai-fan, Xiang   +2 more
openaire   +3 more sources

Flutter analysis of propfans using a three dimensional Euler solver

35th Structures, Structural Dynamics, and Materials Conference, 1994
A three-dimensional aeroelastic solver is developed and applied to investigate the flutter of a propfan. The unsteady airloads are obtained by solving three-dimensional Euler equations. An implicit-explicit hybrid scheme is used to reduce computational time for the solution of Euler equations.
R. Srivastava, T. S. R. Reddy, O. Mehmed
openaire   +2 more sources