Dynamic mechanical response of beech (Fagus sylvatica L.) - Numerical analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F20%3A43921021" target="_blank" >RIV/62156489:43410/20:43921021 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.hardwood.uni-sopron.hu/wp-content/uploads/2021/06/HWC2020_proceedings_final_online_I.pdf" target="_blank" >http://www.hardwood.uni-sopron.hu/wp-content/uploads/2021/06/HWC2020_proceedings_final_online_I.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Dynamic mechanical response of beech (Fagus sylvatica L.) - Numerical analysis

Popis výsledku v původním jazyce

The wind gusts occur more frequently in recent years and also hardwood stands can be seriously damaged by the wind storms. The mechanical responses of a tree at the forest scale are described by simplified models, for example FOREOLE (Ancelin et al. 2004), GALES and HWIND (Gardiner et al. 2000). These models describe static beam response with the use of a gust factor as a consideration of dynamic-wind characteristic. With the development of numerical methods, the more complex models of response to the turbulent airflow reflecting vibrations and damping of trees are available mainly for softwoods (Sellier et al. 2008). The experimental analyses of tree dynamic response are then more aimed at the effect of tree architecture, rather than considering tree defects (James et al., 2006). Our work aims to present a modal, harmonic and transient finite-element analysis of broadleaved tree response with respect to its material properties and architecture. The analyses were carried out using ANSYS Mechanical APDL software to describe the natural frequencies, mode shapes and development of amplitudes in frequency and time domain. The parametric beam based finite-element model of the tree with orthotropic material was developed. The model outputs were compared with the field experiment data. The parametric definition of the model enabled &quot;what-if&quot; analyses with the change of geometry and material constants simulating different defects and trees scenarios. The relationship between the dynamic response of model and tree defects were found to be a significant, which provides the possibility of application in non-destructive tree assessment.

Název v anglickém jazyce

Dynamic mechanical response of beech (Fagus sylvatica L.) - Numerical analysis

Popis výsledku anglicky

The wind gusts occur more frequently in recent years and also hardwood stands can be seriously damaged by the wind storms. The mechanical responses of a tree at the forest scale are described by simplified models, for example FOREOLE (Ancelin et al. 2004), GALES and HWIND (Gardiner et al. 2000). These models describe static beam response with the use of a gust factor as a consideration of dynamic-wind characteristic. With the development of numerical methods, the more complex models of response to the turbulent airflow reflecting vibrations and damping of trees are available mainly for softwoods (Sellier et al. 2008). The experimental analyses of tree dynamic response are then more aimed at the effect of tree architecture, rather than considering tree defects (James et al., 2006). Our work aims to present a modal, harmonic and transient finite-element analysis of broadleaved tree response with respect to its material properties and architecture. The analyses were carried out using ANSYS Mechanical APDL software to describe the natural frequencies, mode shapes and development of amplitudes in frequency and time domain. The parametric beam based finite-element model of the tree with orthotropic material was developed. The model outputs were compared with the field experiment data. The parametric definition of the model enabled &quot;what-if&quot; analyses with the change of geometry and material constants simulating different defects and trees scenarios. The relationship between the dynamic response of model and tree defects were found to be a significant, which provides the possibility of application in non-destructive tree assessment.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

40102 - Forestry

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

9th Hardwood Proceedings − Part I.

ISBN

978-963-334-377-7

ISSN

2631-004X

e-ISSN

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Počet stran výsledku

8

Strana od-do

291-298

Název nakladatele

University of Sopron

Místo vydání

Sopron

Místo konání akce

Sopron

Datum konání akce

24. 6. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000853723900052