INVESTIGATION FOR THE VALIDITY OF FINITE ELEMENT ANALYSIS BASED ON THE THIN WALLED BEAM THEORY IN ACTUAL STRUCTURAL DESIGN : Study on structural analysis of a highrise building by the thin-walled beam theory (Part2)

A formex formulation of the topological configuration, geometry, loading and support conditions of finite element meshes used for the analysis of thin-walled structures is presented. The finite element mesh required for the structural analysis is generated from a series of modifications and transformations of a protomorph. The formex formulation is implemented in a menu driven preprocessor for the analysis of thin-walled structures of arbitrarily shaped section. Several examples generated using this formulation are presented.

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Structural Analysis of a Teat Cup Liner

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.43.675 ◽

2010 ◽

Vol 43 ◽

pp. 675-677

Author(s):

Sho Hei Adachi ◽

Li Min Bao ◽

Osamu Yamazaki

Keyword(s):

Finite Element Method ◽

Finite Element Analysis ◽

Finite Element ◽

Structural Analysis ◽

Butadiene Rubber ◽

Compression Tests ◽

The Finite Element Method ◽

Element Analysis ◽

Suitable Structure ◽

Thin Walled

This study attempts to analyze the structure of the thin-walled part in the teat cup liner for FEM by the finite-element method (FEM) and to determine the most suitable structure for it. For the first step, we prepared a specimen liner made from NBR (Acrylonitrile-Butadiene Rubber) and silicon rubber (made by ORION MACHINERY CO., LTD.) and conducted tensile and compression tests for mechanical scraping properties of rubber Data. We then analyzed the thin-walled part using SolidWorks Simulation (SolidWorks Corporation) for finite-element analysis in liner process from expression of milk into nipple massage.

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Natural frequency analysis of a functionally graded rotor-bearing system with a slant crack subjected to thermal gradients

International Journal of Turbo and Jet Engines ◽

10.1515/tjj-2021-0002 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Arnab Bose ◽

Prabhakar Sathujoda ◽

Giacomo Canale

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Power Law ◽

Beam Theory ◽

Functionally Graded ◽

Thermal Gradients ◽

Element Analysis ◽

Rotor Bearing ◽

Natural Frequency Analysis ◽

Bearing System

Abstract The present work aims to analyze the natural and whirl frequencies of a slant-cracked functionally graded rotor-bearing system using finite element analysis for the flexural vibrations. The functionally graded shaft is modelled using two nodded beam elements formulated using the Timoshenko beam theory. The flexibility matrix of a slant-cracked functionally graded shaft element has been derived using fracture mechanics concepts, which is further used to develop the stiffness matrix of a cracked element. Material properties are temperature and position-dependent and graded in a radial direction following power-law gradation. A Python code has been developed to carry out the complete finite element analysis to determine the Eigenvalues and Eigenvectors of a slant-cracked rotor subjected to different thermal gradients. The analysis investigates and further reveals significant effect of the power-law index and thermal gradients on the local flexibility coefficients of slant-cracked element and whirl natural frequencies of the cracked functionally graded rotor system.

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Structural Analysis of Centrifugal Fan Impeller Using CATIA Software

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.809-810.859 ◽

2015 ◽

Vol 809-810 ◽

pp. 859-864

Author(s):

Dănuţ Zahariea

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Structural Analysis ◽

Design Methods ◽

Constant Thickness ◽

Blade Design ◽

Centrifugal Fan ◽

Element Analysis ◽

The Finite Element Analysis ◽

Modes Of Vibration

In this paper, the finite element analysis for stress/deformation/modes of vibration for the centrifugal fan impeller with constant thickness backward-curved blades using CATIA software will be presented. The principal steps of the finite element analysis procedure using CATIA/Generative Structural Analysis environment will be presented: creating the 3D model; configuring the mesh; applying the restraints; applying the loads; running the numerical static analysis and the numerical frequency analysis; interpreting the results and observing the modes of vibration correlating with the impeller mode shape. This procedure will be used for 4 different centrifugal fan impellers according with the 4 blade design methods and the results will be comparatively analyzed. For each design method, two materials will be used: steel with density of 7860 kg/m3 and aluminium with density of 2710 kg/m3. Two important results have been obtained after the structural analysis: under the working conditions considered for the analysis, all 4 blade design methods leads to impellers with very good mechanical behaviour; any frequency of the main modes of vibrations for all blade design methods and for both materials is not in phase with the impeller speed, thus the possibility of resonance being eliminated.

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