Analysis of Stability and Dynamic Behaviour of Cracked Cantilever T-beams Subjected to Axial Force

Models have been used of the flow of the liquid phase in the reactor (cascade of two ideally mixed cells of different size, two equal-size cells with recycle, two equal-size cells with inlets to both cells and a model of two equal-size cells preceded with a back flow element with plug flow) to analyze the oscillatory states of an industrial reactor. Stable and instable steady states have been classified using analysis of pseudosteady states of conversion and temperature supplemented with a simulation of the dynamic behaviour. It has been that the deviations of the flow from an ideally mixed system may expand the region of the oscillatory behaviour. The detailed information about the character of the flow in the reactor and the way of feeding the reactor has been also found important for the analysis of stability.

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Numerical analysis of stability of an axially-compressed i-beam rod subjected to constrained torsion

Stroitel stvo nauka i obrazovanie [Construction Science and Education] ◽

10.22227/2305-5502.2020.4.2 ◽

2020 ◽

pp. 11-27

Author(s):

Amirshokh Kh. Abdurakhmonov

Keyword(s):

Numerical Analysis ◽

Axial Force ◽

Analytical Data ◽

Practical Interest ◽

Numerical Calculations ◽

Analysis Method ◽

Numerical Analysis Method ◽

Open Section ◽

Thin Walled ◽

Analysis Of Stability

Introduction. Today thin-walled structures are widely used in the construction industry. The analysis of their rigidity, strength and stability is a relevant task which is of particular practical interest. The article addresses a method for the numerical analysis of stability of an axially-compressed i-beam rod subjected to the axial force and the bimoment. An axially compressed i-beam rod is the subject of the study. Materials and methods. Femap with NX Nastran were chosen as the analysis toolkit. Axially compressed cantilever steel rods having i-beam profiles and different flexibility values were analyzed under the action of the bimoment. The steel class is C245. Analytical data were applied within the framework of the Euler method and the standard method of analysis pursuant to Construction Regulations 16.13330 to determine the numerical analysis method. Results. The results of numerical calculations are presented in geometrically and physically nonlinear settings. The results of numerical calculations of thin-walled open-section rods, exposed to the axial force and the bimoment, are compared with the results of analytical calculations. Conclusions. Given the results of numerical calculations, obtained in geometrically and physically nonlinear settings, recommendations for the choice of a variable density FEM model are provided. The convergence of results is estimated for different diagrams describing the steel behavior. The bearing capacity of compressed cantilever rods, exposed to the bimoment, is estimated for the studied flexibility values beyond the elastic limit. A simplified diagram, describing the steel behaviour pursuant to Construction regulations 16.13330, governing the design of steel structures, is recommended to ensure the due regard for the elastoplastic behaviour of steel. The numerical analysis method, developed for axially-compressed rods, is to be applied to axially-compressed thin-walled open-section rods. National Research Moscow State University is planning to conduct a series of experiments to test the behaviour of axially-compressed i-beams exposed to the bimoment and the axial force. Cantilever i-beams 10B1 will be used in experimental testing.

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Boundary controllability of nonlinear beams to bounded states

Proceedings of the Royal Society of Edinburgh Section A Mathematics ◽

10.1017/s0308210500028316 ◽

1991 ◽

Vol 119 (1-2) ◽

pp. 63-72 ◽

Cited By ~ 14

Author(s):

J. E. Lagnese

Keyword(s):

Nonlinear Model ◽

Axial Force ◽

Shear Force ◽

Dynamic Behaviour ◽

Bending Moment ◽

Vertical Shear ◽

Boundary Controllability ◽

Nonlinear Beams ◽

Cantilevered Beam ◽

Admissible Controls

SynopsisConsidered is a nonlinear model which describes the dynamic behaviour of the not necessarily small longitudinal and transverse displacements of a thin, cantilevered beam. The motion of the beam is driven by a bending moment, an axial force and a vertical shear force that act at the free end of the beam. The main goal is to describe the reachable set of the system, that is, the set of all states that can be reached by varying the end forces within a certain set of admissible controls.

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Investigation of fused silica dynamic behaviour

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:2006134142 ◽

2006 ◽

Vol 134 ◽

pp. 929-934 ◽

Cited By ~ 2

Author(s):

F. Malaise ◽

J.-M. Chevalier ◽

I. Bertron ◽

F. Malka

Keyword(s):

Dynamic Behaviour ◽

Fused Silica

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A MODEL FOR THE FATIGUE SATURATION RANGE OF ALUMINIUM FROM DYNAMIC BEHAVIOUR AND INTERACTIONS OF DISLOCATIONS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1987820 ◽

1987 ◽

Vol 48 (C8) ◽

pp. C8-155-C8-160

Author(s):

R. FOUGERES ◽

J. CHICOIS ◽

A. HAMEL ◽

A. VINCENT

Keyword(s):

Dynamic Behaviour

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Analysis of the Multi-Channel Epileptiform EEG Using the Markov Chains Formalism

Methods of Information in Medicine ◽

10.1055/s-0038-1635557 ◽

1989 ◽

Vol 28 (03) ◽

pp. 160-167 ◽

Cited By ~ 1

Author(s):

P. Penczek ◽

W. Grochulski

Keyword(s):

Dynamic Behaviour ◽

Joint Probability ◽

Drug Effects ◽

Anticonvulsant Drug ◽

Channel System ◽

Markov Network ◽

Eeg Data ◽

Multi Level ◽

Joint Probability Functions ◽

Dependent State

Abstract:A multi-level scheme of syntactic reduction of the epileptiform EEG data is briefly discussed and the possibilities it opens up in describing the dynamic behaviour of a multi-channel system are indicated. A new algorithm for the inference of a Markov network from finite sets of sample symbol strings is introduced. Formulae for the time-dependent state occupation probabilities, as well as joint probability functions for pairs of channels, are given. An exemplary case of analysis in these terms, taken from an investigation of anticonvulsant drug effects on EEG seizure patterns, is presented.

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On The Dynamic Behaviour of Automobile Pulleys Under Cyclic Loading

Karbala International Journal of Modern Science ◽

10.33640/2405-609x.1603 ◽

2020 ◽

Vol 6 (2) ◽

Author(s):

Haval Kamal Asker ◽

Thaker Saleh Dawood

Keyword(s):

Cyclic Loading ◽

Dynamic Behaviour

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Representation of bolted joints in a structure using finite element modelling and model updating

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.14.3.2020.15.0560 ◽

2020 ◽

Vol 14 (3) ◽

pp. 7141-7151 ◽

Cited By ~ 1

Author(s):

R. Omar ◽

M. N. Abdul Rani ◽

M. A. Yunus

Keyword(s):

Finite Element ◽

Dynamic Behaviour ◽

Model Updating ◽

Complex Structure ◽

Bolted Joints ◽

Model Parameters ◽

Fe Model ◽

Bolted Joint ◽

Fe Modelling ◽

Joint Structure

Efficient and accurate finite element (FE) modelling of bolted joints is essential for increasing confidence in the investigation of structural vibrations. However, modelling of bolted joints for the investigation is often found to be very challenging. This paper proposes an appropriate FE representation of bolted joints for the prediction of the dynamic behaviour of a bolted joint structure. Two different FE models of the bolted joint structure with two different FE element connectors, which are CBEAM and CBUSH, representing the bolted joints are developed. Modal updating is used to correlate the two FE models with the experimental model. The dynamic behaviour of the two FE models is compared with experimental modal analysis to evaluate and determine the most appropriate FE model of the bolted joint structure. The comparison reveals that the CBUSH element connectors based FE model has a greater capability in representing the bolted joints with 86 percent accuracy and greater efficiency in updating the model parameters. The proposed modelling technique will be useful in the modelling of a complex structure with a large number of bolted joints.

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