Your browser does not allow JavaScript!
JavaScript is necessary for the proper functioning of this website. Please enable JavaScript or use a modern browser.
Open Science Slovenia
Open Science
DiKUL
slv
|
eng
Search
Browse
New in RUL
About RUL
In numbers
Help
Sign in
Identification of damping of Spruce wood (Picea abies) under various levels of moisture content using time-scale decomposition
ID
Merhar, Miran
(
Author
)
PDF - Presentation file,
Download
(5,49 MB)
MD5: 97CC5A2EC723278D00F83A62B0312958
URL - Source URL, Visit
https://www.mdpi.com/2073-4360/16/10/1313
Image galllery
Abstract
The damping of spruce wood is analysed at different moisture content levels for the first three vibration modes of tangentially and radially vibrating samples. Two methods were used to determine the damping. The first was the vibration envelope fitting as an improved version of the well-known logarithmic decrement, and the second was the newer and recently increasingly used wavelet transform. Both methods showed that the damping of spruce wood first decreases and then increases with moisture content, with the damping in the first vibration mode being about 9% higher in the radial direction than in the tangential direction. In the second and third vibration modes, the damping in the tangential direction was higher than in the radial direction by about 10% and 8.8%, respectively. The measured damping factors from the envelope fitting had, on average, 15.9% higher values than those from the wavelet transform. It can be concluded from the results that the wavelet transform is more accurate for determining the damping factor, as it enables the decoupling of multi-degree of freedom systems if mode coupling is present.
Language:
English
Keywords:
damping factor
,
wavelet transform
,
logarithmic decrement
,
relative humidity
,
impulse response function
,
time response
,
natural frequency
,
frequency response function
,
Morlet wavelet
,
vibration
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
BF - Biotechnical Faculty
Publication status:
Published
Publication version:
Version of Record
Publication date:
01.01.2024
Year:
2024
Number of pages:
14 str.
Numbering:
Vol. 16, iss. 10, [article no.] 1313
PID:
20.500.12556/RUL-156191
UDC:
630*8
ISSN on article:
2073-4360
DOI:
10.3390/polym16101313
COBISS.SI-ID:
194771459
Publication date in RUL:
13.05.2024
Views:
293
Downloads:
26
Metadata:
Cite this work
Plain text
BibTeX
EndNote XML
EndNote/Refer
RIS
ABNT
ACM Ref
AMA
APA
Chicago 17th Author-Date
Harvard
IEEE
ISO 690
MLA
Vancouver
:
Copy citation
Share:
Record is a part of a journal
Title:
Polymers
Shortened title:
Polymers
Publisher:
Molecular Diversity Preservation International
ISSN:
2073-4360
COBISS.SI-ID:
517951257
Licences
License:
CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
Link:
http://creativecommons.org/licenses/by-nc/4.0/
Description:
A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.
Secondary language
Language:
Slovenian
Keywords:
faktor dušenja
,
valčna transformacija
,
logaritmični dekrement
,
relativna vlažnost
,
odziv na impulzno vzbujanje
,
lastna frekvenca
,
funkcija frekvenčnega odziva
,
Morletova valčna funkcija
,
nihanje
Projects
Funder:
ARIS - Slovenian Research and Innovation Agency
Project number:
P2-0182
Name:
Razvojna vrednotenja
Similar documents
Similar works from RUL:
Similar works from other Slovenian collections:
Back