Validation of Solutions for Dynamic Analysis of Pipeline Systems by Comparing the Results of Calculations Obtained in the Russian CAE system APM StructFEM and in ANSYS as Applied to Seismic Resistance Problems

2020 ◽  
pp. 34-43
Author(s):  
V.V. Shelofast ◽  
V.V. Shelofast ◽  
A.A. Zamriy
Keyword(s):  
Finite Elements ◽  
Dynamic Analysis ◽  
Cross Section ◽  
Seismic Resistance ◽  
Pipe Model ◽  
Pipeline Systems ◽  
Time Required ◽  
Cae System ◽  
Modeling Feature ◽  
Calculation Procedures

Modeling pipelines using special tubular finite elements is a convenient tool for the analysis of pipeline systems. Such a formulation significantly reduces the dimension of the problem being solved and significantly accelerates the time required to perform calculation procedures. These advantages can be explained by a modeling feature that involves the use of a pipe model in the form of a rod having an annular cross section. This paper presents solutions to the problem of dynamic analysis of pipeline systems, including analysis of the pipeline response to seismic effects. The work was performed to assess the reliability of the dynamic solutions obtained using the Russian CAE system APM StructFEM.

scholarly journals 3D MODELING, SIMULATION AND ANALYSIS OF ANTI-VIBRATION BORING BAR

2021 ◽  
Vol 3 ◽  
pp. 310-313
Author(s):  
Sabi Sabev ◽  
Plamen Kasabov
Keyword(s):  
Finite Elements ◽  
Dynamic Analysis ◽  
3D Modeling ◽  
Virtual Prototype ◽  
Finite Elements Method ◽  
Design Stage ◽  
Boring Bar ◽  
Modeling Simulation ◽  
Cae System

This study presents the capabilities of the engineering dynamic analysis according to the Finite Elements Method (FEM), demonstrated on a 3D virtual prototype of a part "Anti-vibration boring bar" for lathe. The analysis is performed with help of CAE system Ansys. The modal frequencies are determined which are necessary for optimizing the constructive parameters of the product during the design stage.

Dynamic Analysis of Planetary Gear Reducer

2018 ◽  
Vol 880 ◽  
pp. 87-92
Author(s):  
Daniela Vintilă ◽  
Laura Diana Grigorie ◽  
Alina Elena Romanescu
Keyword(s):  
Finite Elements ◽  
Differential Equations ◽  
Dynamic Analysis ◽  
Frequency Response ◽  
Planetary Gear ◽  
Resonance Phenomenon ◽  
Superposition Method ◽  
Planetary Gears ◽  
Tower Crane ◽  
Systems Of Differential Equations

This paper presents dynamic analysis of a three stage planetary gear reducer for operate a tower crane. Ordinary and planetary gears have been designed respecting the coaxial, neighboring and mounting conditions. Harmonic analysis has been processed to identify frequency response for displacements, strains and deformations. The aim of the study was to determine critical frequencies to avoid mechanical resonance phenomenon. The obtained results are based on the superposition method for solving the systems of differential equations resulting from the analysis with finite elements.

A Grinding/Polishing Tool for TEM Sample Preparation

1987 ◽  
Vol 115 ◽  
Author(s):  
S. J. Klepeis ◽  
J. P. Benedict ◽  
R. M. Anderson
Keyword(s):  
Sample Preparation ◽  
Cross Section ◽  
Ion Milling ◽  
Silicon Devices ◽  
Time Required ◽  
Polishing Tool ◽  
Rough Cut

ABSTRACTA grinding/polishing tool has been developed for preparing TEM samples. The hand-held tool is 2.50″ in diameter and 3.0″ high. Rough-cut samples, 300 to 600 microns thick, are routinely polished to 5 microns thick in four to six hours using this tool. As these 5 micron samples are so thin and uniform, a separate dimpling operation can be eliminated. Likewise, the time required to ion-mill the sample can be reduced to 0.5 to 2.0 hours – greatly reducing ion-milling artifacts and significantly increasing the area viewable by TEM. The process is equally effective for all classes of samples: Silicon devices, ceramics or metals – in either cross-section or planar views.

scholarly journals Numerical modeling of reinforced concrete structures: static and dynamic analysis

2013 ◽  
Vol 66 (4) ◽  
pp. 425-430 ◽  
Author(s):  
Jorge Luis Palomino Tamayo ◽  
Armando Miguel Awruch ◽  
Inácio Benvegnu Morsch
Keyword(s):  
Reinforced Concrete ◽  
Numerical Model ◽  
Finite Elements ◽  
Dynamic Analysis ◽  
Time Integration ◽  
Great Accuracy ◽  
Constitutive Law ◽  
Published Data ◽  
Static And Dynamic Analysis ◽  
Plates And Shells

A numerical model using the Finite Element Method (FEM) for the nonlinear static and dynamic analysis of reinforced concrete (RC) beams, plates and shells is presented in this work. For this purpose, computer programs based on plasticity theory and with crack monitoring capabilities are developed. The static analysis of RC shells up to failure load is carried out using 9-node degenerated shell finite elements while 20-node brick finite elements are used for dynamic applications. The elasto-plastic constitutive law for concrete is coupled with a strain-rate sensitive model in order to take into account high loading rate effect when transient loading is intended. The implicit Newmark scheme with predictor and corrector phases is used for time integration of the nonlinear system of equations. In both cases, the steel reinforcement is considered to be smeared and represented by membrane finite elements. Various benchmark examples are solved with the present numerical model and comparisons with other published data are performed. For all examples, the path failure, collapse loads and failure mechanism is reproduced with great accuracy.

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