A Proposed Geological Parameterization Method for Parameter Identification in Three-Dimensional Groundwater Modeling

1995 ◽  
Vol 31 (1) ◽  
pp. 89-102 ◽  
Author(s):  
Ne-Zheng Sun ◽  
Ming-Chin Jeng ◽  
William W. -G. Yeh
Keyword(s):  
Parameter Identification ◽  
Groundwater Modeling ◽  
Three Dimensional ◽  
Parameterization Method ◽  
Geological Parameterization

scholarly journals Three-dimensional hydraulic conductivity upscaling in groundwater modeling

2010 ◽  
Vol 36 (10) ◽  
pp. 1224-1235 ◽  
Author(s):  
Haiyan Zhou ◽  
Liangping Li ◽  
J. Jaime Gómez-Hernández
Keyword(s):  
Hydraulic Conductivity ◽  
Groundwater Modeling ◽  
Three Dimensional

Parameter Identification of Crack Growth in Helicopter Blade

2013 ◽  
Vol 577-578 ◽  
pp. 673-676
Author(s):  
A. Chellil ◽  
A. Nour ◽  
S. Lecheb ◽  
M. Chibani ◽  
H. Kebir
Keyword(s):  
Parameter Identification ◽  
Three Dimensional ◽  
The Finite Element Method ◽  
Three Dimensional Model ◽  
Modal Parameter ◽  
Helicopter Blade ◽  
Modal Parameter Identification ◽  
Aerodynamic Model ◽  
Eigen Frequencies ◽  
Identification Analysis

This paper presents a fatigue parameter identification analysis and response of a cracked helicopter blade in the hovering flight condition reinforced by GFRP fiber. The search for increasingly high performances in the field of the helicopters brings to the development of materials having higher rigidities and specific resistances. The use of the composite material offers a good aeroelastic Stability. On the basis of aerodynamic model, the use of the finite element method makes it possible to develop a three dimensional model of the blade and to establish dynamic equations of the movement. Numerical calculations of the model developed, prove that the Eigen frequencies of helicopter blade were decreased after cracking in the critical zone, and this reduce is nonlinear; however the stress increased with crack propagation. Therefore the modal parameter identification is an important factor for the detection of fatigue in aircraft structures.

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