Pareto optimum design of laminated composite truncated circular conical shells

2013 ◽  
Vol 14 (4) ◽  
pp. 397-408 ◽  
Author(s):  
Umut Topal
Keyword(s):  
Optimum Design ◽  
Laminated Composite ◽  
Pareto Optimum ◽  
Conical Shells ◽  
Circular Conical Shells

Active Structural-Acoustic Control of Laminated Composite Truncated Conical Shells Using Smart Damping Treatment

2013 ◽  
Vol 135 (2) ◽  
Author(s):  
P. H. Shah ◽  
M. C. Ray
Keyword(s):  
Orientation Angle ◽  
Laminated Composite ◽  
Element Model ◽  
Piezoelectric Composite ◽  
Constrained Layer Damping ◽  
Conical Shells ◽  
Acoustic Cavity ◽  
Acoustic Control ◽  
Circular Conical Shells ◽  
Structural Acoustic Control

This article deals with the active structural-acoustic control of composite truncated circular conical shells using active constrained layer damping (ACLD) treatment. The constraining layer of the ACLD treatment is made of vertically/obliquely reinforced 1–3 piezoelectric composite (PZC) material. A finite element model of smart laminated truncated conical shells backed by the acoustic cavity and integrated with the patches of such ACLD treatment has been developed to demonstrate the performance of these patches for active structural-acoustic control of symmetric and antisymmetric cross-ply and antisymmetric angle-ply truncated conical laminated shells. Both velocity and pressure rate feedback control laws have been implemented to activate the patches. Particular emphasis has also been placed on investigating the effect of variation of piezoelectric fiber orientation angle in the constraining layer on the performance of the patches.

The study of the nonlinear vibration of S-S and C-C laminated composite conical shells on elastic foundations through an approximate method

2021 ◽  
pp. 095440622110214
Author(s):  
Shahin Mohammadrezazadeh ◽  
Ali Asghar Jafari
Keyword(s):  
Boundary Conditions ◽  
Nonlinear Vibration ◽  
Approximate Method ◽  
Laminated Composite ◽  
Vertex Angle ◽  
Nonlinear Frequency ◽  
Conical Shells ◽  
Elastic Foundations ◽  
Vibration Responses ◽  
Comparison Of The Results

This paper investigates the nonlinear vibration responses of laminated composite conical shells surrounded by elastic foundations under S-S and C-C boundary conditions via an approximate approach. The laminated composite conical shells are modeled based on classical shell theory of Love employing von Karman nonlinear theory. Nonlinear vibration equation of the conical shells is extracted by handling Lagrange method. The linear and nonlinear vibration responses are obtained via an approximate method which combines Lindstedt-Poincare method with modal analysis. The validation of this study is carried out through the comparison of the results of this study with results of published literature. The effects of several parameters including the constants of elastic foundations, boundary conditions, total thickness, length, large edge radius and semi-vertex angle on the values of fundamental linear frequency and curves of amplitude parameter versus nonlinear frequency ratio for laminated composite conical shells with both S-S and C-C boundary conditions are investigated.

Analysis of free damped vibrations of laminated composite conical shells

1998 ◽  
Vol 41 (1) ◽  
pp. 39-47 ◽  
Author(s):  
A. Korjakin ◽  
R. Rikards ◽  
A. Chate ◽  
H. Altenbach
Keyword(s):  
Laminated Composite ◽  
Conical Shells
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