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Relevantne lastnosti resonančne smrekovine [Elektronski vir] : diplomsko delo = Relevant properties of resonance spruce wood : B. Sc. ThesisMenegatti, AljažNamesto tradicionalnega vizualnega in čutnega ocenjevanja kakovosti resonančne smrekovine smo v nalogi laboratorijsko analizirali makroskopsko zgradbo ter njene fizikalne, mehanske in akustične ... lastnosti. Vzorčili smo smrekov les s Pokljuke (1200 m n.v., oddelek 64), z majhnim letnim priraščanjem in jo primerjali s kontrolno smrekovino z nižje ležečega rastišča (Zavratec nad Idrijo, 650 m n.v.). Iz naravno posušenega lesa smo izdelali preizkušance (dimenzij 20 × 20 × 300 mm) za določanje dinamičnih in statičnih mehanskih lastnosti. Dodatno smo izdelali še poliedre (dimenzij 75 × 75 × 75mm) in na njih izmerili hitrosti preleta ultrazvočnega valovanja v vseh anatomskih smereh in ravninah. Strukturne lastnosti smo določili stereo-mikroskopsko, izmerili smo širino branik, delež kasnega lesa ter določili povprečno gostoto lesa. Ugotovili smo, da je smrekov les z dobrimi resonančnimi lastnostmi redek. Le-ta ima nizko gostoto (≤ 400 kg/m3), počasno (do 2 mm) in homogeno priraščanje, z majhnim deležem kasnega lesa (do 23 %). Resonančna smrekovina je vzdolž lesnih vlaken bolj toga in ima značilno manjše dušenje vibracij. Pretvorba mehanske energije v zvočno je pri resonančnem smrekovem lesu boljša kot pri navadni smrekovini.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [A. Menegatti], 2022Language - slovenianCOBISS.SI-ID - 123863299
Author
Menegatti, Aljaž
Other authors
Straže, Aleš |
Čufar, Katarina
Topics
les |
smreka |
mehanske lastnosti |
akustične lastnosti |
priraščanje |
wood |
spruce |
mechanical properties |
acoustic properties |
growth characteristics
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Menegatti, Aljaž | |
Straže, Aleš | 18149 |
Čufar, Katarina | 02937 |
Source: Personal bibliographies
and: SICRIS
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