izpis_h1_title_alt

Vpliv obremenitve lesa na spremembe njegovih akustičnih lastnosti : magistrska naloga
ID Jereb, Peter (Author), ID Gorišek, Željko (Mentor) More about this mentor... This link opens in a new window, ID Straže, Aleš (Reviewer)

.pdfPDF - Presentation file, Download (1,13 MB)
MD5: 6006F4DE5F051DC39927D0EBFC0E28E0

Abstract
Na šestih izbranih lesnih vrstah (smreka, jesen, bukev, oreh in češnja) smo med navlaževanjem in sušenjem preizkušancev proučevali spremembe modula elastičnosti, frekvenčni odziv in koeficient dušenja. Uporabili smo resonančno metodo z impulzivnim % elastičnim mehanskim vzbujanjem. Ugotovili smo, da je hitrost spremembe modula elastičnosti pri procesu sušenja dvakrat hitrejša kot pri navlaževanju. S povečevanjem vlažnosti se je koeficient dušenja zmanjševal, vendar so zveze statistično nezanesljive. Najmanjše dušenje zvoka smo zasledili pri jesenovini, smrekovini in češnjevini. Sprememba modula elastičnosti je bila v linearni odvisnosti od povprečne vlažnosti medtem, ko je bil odziv dušenja zvoka hitrejši, kar pripisujemo nastalemu vlažnostnemu gradientu.

Language:Slovenian
Keywords:les, modul elastičnosti, akustične lastnosti lesa, sušenje, navlaževanje
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:BF - Biotechnical Faculty
Place of publishing:Ljubljana
Publisher:[P. Jereb]
Year:2014
Number of pages:XI, 81 f.
PID:20.500.12556/RUL-122403 This link opens in a new window
UDC:630*812.12
COBISS.SI-ID:2277513 This link opens in a new window
Publication date in RUL:09.12.2020
Views:672
Downloads:64
Metadata:XML RDF-CHPDL DC-XML DC-RDF
:
Copy citation
Share:Bookmark and Share

Secondary language

Language:English
Title:The influence of wood loading on its changes of acoustical properties : M. Sc. thesis
Abstract:
On a six selected species of wood - spruce, ash, oak, beech, walnut and cherry- all test specimens were moistened and dried, we investigated changes in the following modules: fundamental frequency, sound damping and elasticity. The method used was resonance with elastic mechanical excitation. We came to conclusion, that modulus of elasticity in drying process changed two times faster than in the moistening process. With moisture increasing, the sound damping coefficient was decreasing, but changes have not been proved statistically important. Lowest sound damping was detected in spruce, cherry and ash. The change in modulus of elasticity was in linear dependency with average moisture content, while response of sound damping was faster. We concluded, that this is due to the moisture gradient.

Keywords:wood, E - modul, acoustic properties, drying, wetting

Similar documents

Similar works from RUL:
Similar works from other Slovenian collections:

Back