Analysis of geometry simplification in frequency-resonance method for non-destructive assessment of stem

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F22%3A43922520" target="_blank" >RIV/62156489:43410/22:43922520 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of geometry simplification in frequency-resonance method for non-destructive assessment of stem

Popis výsledku v původním jazyce

The application of the frequency-resonance method (FRM) on stems is limited by complex geometry. This paper presents the relationship among non-destructively tested material parameters of sugar maples and the numerical analysis of the effect of simplifications in FRM. Four standing stems were 3D scanned to describe the geometry, tested by pulling test to obtain moduli of elasticity (MOE) and cut down to process stem samples. Samples were measured by stress wave propagation using an acoustic tomography to measure sound velocities and evaluated by the FRM to record bending and longitudinal natural frequencies to calculate dynamic MOE; MOE based on different methods were compared. Finite Element Modal analysis working at three levels of geometry simplification (beam, simplified solid, and scan-based solid) was performed. The natural frequencies in bending and longitudinal mode shapes were computed, and the influence of geometry simplification on the resulting frequency response was described.

Název v anglickém jazyce

Analysis of geometry simplification in frequency-resonance method for non-destructive assessment of stem

Popis výsledku anglicky

The application of the frequency-resonance method (FRM) on stems is limited by complex geometry. This paper presents the relationship among non-destructively tested material parameters of sugar maples and the numerical analysis of the effect of simplifications in FRM. Four standing stems were 3D scanned to describe the geometry, tested by pulling test to obtain moduli of elasticity (MOE) and cut down to process stem samples. Samples were measured by stress wave propagation using an acoustic tomography to measure sound velocities and evaluated by the FRM to record bending and longitudinal natural frequencies to calculate dynamic MOE; MOE based on different methods were compared. Finite Element Modal analysis working at three levels of geometry simplification (beam, simplified solid, and scan-based solid) was performed. The natural frequencies in bending and longitudinal mode shapes were computed, and the influence of geometry simplification on the resulting frequency response was described.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

40102 - Forestry

Projekt

<a href="/cs/project/LL1909" target="_blank" >LL1909: Dynamika stromu: popis mechanické odezvy na zatížení</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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