An impedance modeling technique of a fluid‐loaded structure

2005 ◽  
Vol 117 (4) ◽  
pp. 2488-2488
Author(s):  
Chih‐Chun Cheng ◽  
Pi‐Wen Wang
Keyword(s):  
Modeling Technique ◽  
Impedance Modeling ◽  
Loaded Structure

Impedance Modeling Technique for a Fluid-Loaded Structure

AIAA Journal ◽  
2005 ◽  
Vol 43 (11) ◽  
pp. 2454-2465
Author(s):  
C. C. Cheng ◽  
P. W. Wang
Keyword(s):  
Modeling Technique ◽  
Impedance Modeling ◽  
Loaded Structure

A generic impedance modeling technique

2020 ◽  
Vol 123 ◽  
pp. 153301
Author(s):  
Abdulwadood Al-Ali ◽  
Ahmed Elwakil ◽  
Brent Maundy ◽  
David Westwick
Keyword(s):  
Modeling Technique ◽  
Impedance Modeling

Design Optimization of Beams With Multi-Layers of Corrugations

2015 ◽  
Author(s):  
W. N. Cheng ◽  
C. C. Cheng
Keyword(s):  
Dynamic Characteristic ◽  
Frequency Equation ◽  
Optimal Number ◽  
Modeling Technique ◽  
Original Design ◽  
Reduction System ◽  
Straight Beam ◽  
Impedance Modeling ◽  
Corrugated Beam ◽  
Force Equilibrium

Optimal designs of beams with multi-layers of corrugations are introduced in this paper. The dynamic characteristic of corrugated structures is investigated firstly using the impedance modeling technique. The dynamic response of a beam with layers of corrugations is formulated by dividing a corrugated beam into two kinds of structural segments: one, the corrugation modeled as a curved beam using finite element method and the other, the liner treated as a straight beam formulated analytically. Then the frequency equation is derived by assembling the impedance of each structure segment based on conditions of force equilibrium and velocity compatibility. The accuracy of the impedance modeling technique are compared to different existing methods, e.g. FEM, Guyan reduction, improved reduction system (IRS), improved reduction system (DIRS), and iterative improved reduction system (IIRS). Finally, examples of optimal design of corrugated beams are presented. Results further show that with an optimal number of corrugated layers and optimal thickness of liner and medium of each layer, the corrugated beam has a desirable dynamic characteristic, e.g. the first bending natural frequency may increase 40% as compared to that of the original design.

Ensemble RBF Modeling Technique for Quality Design

2019 ◽  
Author(s):  
Linhan Ouyang ◽  
Liangqi Wan ◽  
Chanseok Park ◽  
Jianjun Wang ◽  
Yizhong Ma
Keyword(s):  
Modeling Technique ◽  
Quality Design

A comprehensive and novel predictive modeling technique using detailed pathology factors in men with localized prostate carcinoma

Cancer ◽  
2002 ◽  
Vol 95 (7) ◽  
pp. 1451-1456 ◽  
Author(s):  
Louis Potters ◽  
Rosemary Purrazzella ◽  
Sheryl Brustein ◽  
Paul Fearn ◽  
Steven A. Leibel ◽  
...  
Keyword(s):  
Predictive Modeling ◽  
Prostate Carcinoma ◽  
Modeling Technique
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