Equivalent continuum method for anisogrid composite lattice conical shells with equiangular, equidistant and geodesic spiral ribs

2021 ◽  
pp. 114472
Author(s):  
Hougai Shi ◽  
Hualin Fan ◽  
Guojian Shao
Keyword(s):  
Conical Shells ◽  
Composite Lattice ◽  
Equivalent Continuum

Buckling analysis and design of anisogrid composite lattice conical shells

2011 ◽  
Vol 93 (12) ◽  
pp. 3150-3162 ◽  
Author(s):  
E.V. Morozov ◽  
A.V. Lopatin ◽  
V.A. Nesterov
Keyword(s):  
Buckling Analysis ◽  
Conical Shells ◽  
Analysis And Design ◽  
Composite Lattice

Investigation of the Free Vibrations of Composite Anisogrid Lattice Conical Shells Formed by Geodesically Spiral and Circumferential Ribs

2017 ◽  
Vol 09 (04) ◽  
pp. 1750047 ◽  
Author(s):  
Siamak E. Khadem ◽  
Reza Nezamoleslami
Keyword(s):  
Conical Shell ◽  
Natural Frequencies ◽  
Free Vibration Analysis ◽  
Wave Number ◽  
Vertex Angle ◽  
Conical Shells ◽  
Outer Skin ◽  
Special Cases ◽  
Composite Lattice ◽  
Lattice Part

This paper focuses on the dynamic behavior of composite anisogrid lattice conical shells. Lattice composite conical shell consists of composite helical and circumferential ribs and thin outer skin. The free vibration analysis of anisogrid composite lattice conical shell is presented. A smeared method is employed to calculate the variable coefficients of stiffness of conical shell and more close to the realistic applications. The lattice part of conical shell is modeled as a beam, so in addition to the axial loads, ribs endure shear loads and bending moments. The first-order shear deformation shell theory is used to account for the effects of transverse shear deformations and rotary inertia. The current results are verified with 3D finite element model of conical shell by ANSYS Software and those reported in the literature. Some special cases as influences of geometric parameters of lattice part of shell, effects of boundary conditions and circumferential wave number on natural frequencies of the shell are discussed. It was concluded that employment of the smear method could be recommended for determining the coefficients of stiffness of the composite lattice conical shells with outer skin. Also increasing the vertex angle of cone increases the natural frequencies of conical shell.

Design, analysis and optimization of anisogrid composite lattice conical shells

2018 ◽  
Vol 150 ◽  
pp. 184-195 ◽  
Author(s):  
Valerio G. Belardi ◽  
Pierluigi Fanelli ◽  
Francesco Vivio
Keyword(s):  
Design Analysis ◽  
Conical Shells ◽  
Composite Lattice

Free vibration of pretwisted, cantilevered composite shallow conical shells

AIAA Journal ◽  
1997 ◽  
Vol 35 ◽  
pp. 327-333
Author(s):  
C. W. Lim ◽  
S. Kitipornchai ◽  
K. M. Liew
Keyword(s):  
Free Vibration ◽  
Conical Shells

EFFICIENT METHOD OF CALCULATING LAYERED CONICAL SHELLS WITH LAGRANGE MULTIGRID ELEMENTS USE

2018 ◽  
Vol 19 (3) ◽  
pp. 423-431
Author(s):  
G. I. Rastorguev ◽  
◽  
A. N. Grishanov ◽  
А. D. Matveev ◽  
◽  
...  
Keyword(s):  
Efficient Method ◽  
Conical Shells

Vibration characteristics of rotating truncated conical shells reinforced with agglomerated carbon nanotubes

2021 ◽  
pp. 107754632110004
Author(s):  
Hassan Afshari ◽  
Hossein Amirabadi
Keyword(s):  
Carbon Nanotubes ◽  
Differential Quadrature Method ◽  
Shear Deformation Theory ◽  
Free Vibration Analysis ◽  
Functionally Graded ◽  
Governing Equations ◽  
Conical Shells ◽  
First Order ◽  
Effective Mechanical Properties ◽  
Comprehensive Study

In this article, a comprehensive study is conducted on the free vibration analysis of rotating truncated conical shells reinforced with functionally graded agglomerated carbon nanotubes The shell is modeled based on the first-order shear deformation theory, and effective mechanical properties are calculated based on the Eshelby–Mori–Tanaka scheme along with the rule of mixture. By considering centrifugal and Coriolis accelerations and initial hoop tension, the set of governing equations is derived using Hamilton’s principle and is solved numerically using the differential quadrature method Convergence and accuracy of the presented model are confirmed and the effects of different parameters on the forward and backward frequencies of the rotating carbon nanotube-reinforced truncated conical shells are investigated.

scholarly journals Free vibration of conical shells under arbitrary elastic boundary and simulation verification

2021 ◽  
Vol 1885 (3) ◽  
pp. 032059
Author(s):  
Xinghong Li ◽  
Ting Wang ◽  
Yang Zhao ◽  
Hui Wang
Keyword(s):  
Free Vibration ◽  
Conical Shells ◽  
Elastic Boundary
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