Aeroservoelastic Gust Response Analysis for the Design of Transport Aircrafts

2004 ◽  
Author(s):  
Moti Karpel ◽  
Boris Moulin ◽  
Luis Anguita ◽  
Carlos Maderuelo ◽  
Hector Climent
Keyword(s):  
Response Analysis ◽  
Gust Response

Vibration behavior of an overhead conductor under updraft winds

2021 ◽  
pp. 107754632110058
Author(s):  
Qi Zhou ◽  
Liangtao Zhao ◽  
Chong Zheng ◽  
Feng Tu
Keyword(s):  
Induced Response ◽  
Response Analysis ◽  
Response Factor ◽  
Structural Dynamic ◽  
Resonance Response ◽  
Structural Dynamic Characteristics ◽  
Strong Winds ◽  
American Society ◽  
Gust Response Factor ◽  
Gust Response

At present, the wind-induced response analysis of an overhead conductor is mainly based on the action of horizontal normal wind. However, for crossing hillsides or extremely strong winds, such a conductor will bear the action of updraft wind, which will change the geometry of the conductor and make its structural dynamic characteristics nonlinear to some extent. In this work, the in-plane and out-of-plane two-dimensional nonlinear equations were established under the action of self-weight and updraft wind. Furthermore, the improved equations of conductor tension and sag were obtained, and the wind-induced vibration response was further investigated. The results showed that the updraft wind caused the nonlinearity of the tension and sag of the overhead conductor, and the nonlinear geometric change significantly affected its resonance response, which exceeded 25% if the wind speed was 50 m/s. In addition, because the proportion of the resonance response in the total wind-induced response was different, the influence of the wind attack angle calculated using the gust response factor method on the gust response factor was slightly larger than that calculated using the the American society of civil engineers method.

scholarly journals Gust Response Analysis of a Turbine Cascade

2003 ◽  
Vol 20 (2) ◽  
Author(s):  
Rama Subba Reddy Gorla ◽  
Tondapu Seetharama Reddy ◽  
Dhanireddy Ramalinga Reddy ◽  
Anatole P. Kurkov
Keyword(s):  
Response Analysis ◽  
Turbine Cascade ◽  
Gust Response

Kriging-Based Aeroelastic Gust Response Analysis at High Angles of Attack

AIAA Journal ◽  
2020 ◽  
Vol 58 (9) ◽  
pp. 3777-3787 ◽  
Author(s):  
Wrik Mallik ◽  
Daniella E. Raveh
Keyword(s):  
Response Analysis ◽  
High Angles Of Attack ◽  
Gust Response

scholarly journals Gust Load Alleviation including Geometric Nonlinearities Based on Dynamic Linearization of Structural ROM

2019 ◽  
Vol 2019 ◽  
pp. 1-20
Author(s):  
Chao An ◽  
Chao Yang ◽  
Changchuan Xie ◽  
Yang Meng
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Kernel Functions ◽  
Structural Deformation ◽  
Control Technique ◽  
Feedback Signal ◽  
Response Analysis ◽  
Geometric Nonlinearities ◽  
Gust Load Alleviation ◽  
Gust Response

This paper describes a framework for an active control technique applied to gust load alleviation (GLA) of a flexible wing, including geometric nonlinearities. Nonlinear structure reduced order model (ROM) and nonplanar double-lattice method (DLM) are used for structural and aerodynamic modeling. The structural modeling method presented herein describes stiffness nonlinearities in polynomial formulation. Nonlinear stiffness can be derived by stepwise regression. Inertia terms are constant with linear approximation. Boundary conditions and kernel functions in the nonplanar DLM are determined by structural deformation to reflect a nonlinear effect. However, the governing equation is still linear. A state-space equation is established in a dynamic linearized system around the prescribed static equilibrium state after nonlinear static aeroelastic analysis. Gust response analysis can be conducted subsequently. For GLA analysis, a classic proportional-integral-derivative (PID) controller treats a servo as an actuator and acceleration as the feedback signal. Moreover, a wind tunnel test has been completed and the effectiveness of the control technology is validated. A remote-controlled (RC) model servo is chosen in the wind tunnel test. Numerical simulation results of gust response analysis reach agreement with test results. Furthermore, the control system gives GLA efficacy of vertical acceleration and root bending moment with the reduction rate being over 20%. The method described in this paper is suitable for gust response analysis and control strategy design for large flexible wings.

Gust response analysis for cascades operating in nonuniform mean flows

AIAA Journal ◽  
1991 ◽  
Vol 29 (9) ◽  
pp. 1463-1471 ◽  
Author(s):  
Kenneth C. Hall ◽  
Joseph M. Verdon
Keyword(s):  
Response Analysis ◽  
Gust Response

scholarly journals Wind-induced gust response analysis based on state space formulation.

1996 ◽  
pp. 175-186 ◽  
Author(s):  
Yasunao Matsumoto ◽  
Yozo Fujino ◽  
Kichiro Kimura
Keyword(s):  
State Space ◽  
Response Analysis ◽  
Space Formulation ◽  
Gust Response
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