scholarly journals Flutter Analysis of a Curved PanelUsing a Fluid-Structure Coupled Scheme

2007 ◽  
Vol 55 (638) ◽  
pp. 150-155
Author(s):  
Atsushi Hashimoto ◽  
Naoto Yagi ◽  
Yoshiaki Nakamura ◽  
Fumihiro Ito ◽  
Takeshi Kaiden
Keyword(s):  
Fluid Structure ◽  
Flutter Analysis

scholarly journals A High Efficient Fluid-Structure Interaction Method for Flutter Analysis of Mistuned

2018 ◽  
Vol 36 (5) ◽  
pp. 856-864
Author(s):  
Zhanhe Liu ◽  
Jinlou Quan ◽  
Jingyuan Yang ◽  
Dan Su ◽  
Weiwei Zhang
Keyword(s):  
Fluid Structure Interaction ◽  
Reduced Order Model ◽  
Interaction Method ◽  
Order Model ◽  
Fluid Structure ◽  
Reduced Order ◽  
Structure Interaction ◽  
Bladed Disk ◽  
High Efficient ◽  
Flutter Analysis

The time cost is very high by direct fluid-structure interaction method for mistuned bladed disk structures, so aerodynamic loads generally are ignored or treated as small perturbations in traditional flutter analysis. In order to analyze the flutter characteristics of mistuned blade rapidly and accurately, this paper presents an efficient fluid-structure interaction method based on aerodynamic reduced order model. system identification technology and two basic assumptions are used to build the unsteady aerodynamic reduced order model. Coupled the structural equations and the aerodynamic model in the state space, the flutter stability of mistuned bladed disk can be obtained by changing the structural parameters. For the STCF 4 example, the response calculated by this method agrees well with the results obtained by the direct CFD, but the computational efficiency is improved by nearly two orders of magnitude. This method is used to study the stiffness mistuned cascade system, and the stability characteristics of the system are obtained by calculating the eigenvalues of the aeroelastic matrix. The results show that the stiffness mistuning can significantly improve the flutter stability of the system, and also lead to the localization of the mode. The mistuning mode, mistuning amplitude and fluid structure interaction can influence the flutter stability obviously.

An energy method for flutter analysis of wing using one-way fluid structure coupling

2016 ◽  
Vol 231 (14) ◽  
pp. 2560-2569
Author(s):  
Jize Zhong ◽  
Zili Xu
Keyword(s):  
Energy Method ◽  
Stokes Equations ◽  
Navier Stokes ◽  
Navier Stokes Equations ◽  
Fluid Structure ◽  
Aerodynamic Damping ◽  
Wing Vibration ◽  
Flutter Analysis ◽  
Flutter Boundary ◽  
Reynolds Averaged Navier Stokes

In this paper, an energy method for flutter analysis of wing using one-way fluid structure coupling was developed. To consider the effect of wing vibration, Reynolds-averaged Navier–Stokes equations based on the arbitrary Lagrangian Eulerian coordinates were employed to model the flow. The flow mesh was updated using a fast dynamic mesh technology proposed by our research group. The pressure was calculated by solving the Reynolds-averaged Navier–Stokes equations through the SIMPLE algorithm with the updated flow mesh. The aerodynamic force for the wing was computed using the pressure on the wing surface. Then the aerodynamic damping of the wing vibration was computed. Finally, the flutter stability for the wing was decided according to whether the aerodynamic damping was positive or not. Considering the first four modes, the aerodynamic damping for wing 445.6 was calculated using the present method. The results show that the aerodynamic damping of the first mode is lower than the aerodynamic damping of higher order modes. The aerodynamic damping increases with the increase of the mode order. The flutter boundary for wing 445.6 was computed using the aerodynamic damping of the first mode in this paper. The calculated flutter boundary is consistent well with the experimental data.

Flutter Analysis of Tandem Cascades Based on a Fluid–Structure Coupling Method

2019 ◽  
Vol 32 (2) ◽  
pp. 04018147
Author(s):  
Weiwei Zhang ◽  
Yabin Xu ◽  
Dan Su ◽  
Yiqi Gao
Keyword(s):  
Coupling Method ◽  
Fluid Structure ◽  
Flutter Analysis ◽  
Tandem Cascades

Flutter Analysis of Rotor Based on a Fluid–Structure Method

2020 ◽  
pp. 76-84
Author(s):  
Jaime Cruz Cruz ◽  
Miguel Toledo Velázquez ◽  
Oliver M. Huerta Chávez ◽  
Gibran Jalil Garnica Castro ◽  
Rafael Sánchez López
Keyword(s):  
Fluid Structure ◽  
Flutter Analysis

Fluid-Structure Interactions

2009 ◽  
Author(s):  
Michael Paidoussis ◽  
Stuart Price ◽  
Emmanuel de Langre
Keyword(s):  
Fluid Structure Interactions ◽  
Fluid Structure
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