The influence of changing amplitude of the initial imperfections on the laterally loaded cylindrical shell

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25510%2F18%3A39912343" target="_blank" >RIV/00216275:25510/18:39912343 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.tf.llu.lv/conference/proceedings2018/Papers/N471.pdf" target="_blank" >http://www.tf.llu.lv/conference/proceedings2018/Papers/N471.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22616/ERDev2018.17.N471" target="_blank" >10.22616/ERDev2018.17.N471</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The influence of changing amplitude of the initial imperfections on the laterally loaded cylindrical shell

Popis výsledku v původním jazyce

The article is devoted to the research of thin-walled shell structures. Specifically, this article deals with the influence of initial imperfections on the loss of stability of the laterally loaded cylindrical shell. Previous contributions of the author on this topic were using initial imperfections of constant amplitude; however, initial imperfections of changing amplitude were used in this phase of research. The examined structure is considered as a part of the simplified case of the cylindrical shell (part of a road tank), which is located on saddle supports. The beginning of the initial shape imperfections is considered as state of overloading of the structure from its own weight and the weight of its content. The initial imperfections of the shape are created by pushing the rigid saddle support into the shell. Therefore, the new deformed shape of the shell can be used as an imperfect shell in the following nonlinear analysis. The objective of the analysis is to evaluate the so-called reduction factor α. The reduction factor depends on the change of the geometric parameters of the numerical model and on the change of amplitude of initial imperfections. The most important geometric parameters are the embracing angle of the saddle support 2θ and the wall thickness of the shell t. The changing amplitude of the initial imperfections Δw is represented here by the dimensionless parameter Δw/t with regard to the shell thickness t. The numerical analysis was carried out by means of a computer program COSMOS/M based on the finite element method (FEM).

Název v anglickém jazyce

The influence of changing amplitude of the initial imperfections on the laterally loaded cylindrical shell

Popis výsledku anglicky

The article is devoted to the research of thin-walled shell structures. Specifically, this article deals with the influence of initial imperfections on the loss of stability of the laterally loaded cylindrical shell. Previous contributions of the author on this topic were using initial imperfections of constant amplitude; however, initial imperfections of changing amplitude were used in this phase of research. The examined structure is considered as a part of the simplified case of the cylindrical shell (part of a road tank), which is located on saddle supports. The beginning of the initial shape imperfections is considered as state of overloading of the structure from its own weight and the weight of its content. The initial imperfections of the shape are created by pushing the rigid saddle support into the shell. Therefore, the new deformed shape of the shell can be used as an imperfect shell in the following nonlinear analysis. The objective of the analysis is to evaluate the so-called reduction factor α. The reduction factor depends on the change of the geometric parameters of the numerical model and on the change of amplitude of initial imperfections. The most important geometric parameters are the embracing angle of the saddle support 2θ and the wall thickness of the shell t. The changing amplitude of the initial imperfections Δw is represented here by the dimensionless parameter Δw/t with regard to the shell thickness t. The numerical analysis was carried out by means of a computer program COSMOS/M based on the finite element method (FEM).

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Engineering for Rural Development

ISBN

—

ISSN

1691-3043

e-ISSN

—

Počet stran výsledku

6

Strana od-do

801-806

Název nakladatele

Latvia University of Afgriculture

Místo vydání

Jelgava

Místo konání akce

Jelgava

Datum konání akce

23. 5. 2018

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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