izpis_h1_title_alt

Identification of damping of Spruce wood (Picea abies) under various levels of moisture content using time-scale decomposition
ID Merhar, Miran (Author)

.pdfPDF - Presentation file, Download (5,49 MB)
MD5: 97CC5A2EC723278D00F83A62B0312958
URLURL - Source URL, Visit https://www.mdpi.com/2073-4360/16/10/1313 This link opens in a new window

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 This link opens in a new window
UDC:630*8
ISSN on article:2073-4360
DOI:10.3390/polym16101313 This link opens in a new window
COBISS.SI-ID:194771459 This link opens in a new window
Publication date in RUL:13.05.2024
Views:103
Downloads:16
Metadata:XML RDF-CHPDL DC-XML DC-RDF
:
Copy citation
Share:Bookmark and 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 This link opens in a new window

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