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Akustične lastnosti bukovine po hidrotermični obdelavi = Acoustic properties of beech wood after hydrothermal treatmentŽveplan, Ervin ; Straže, AlešRaziskali smo akustične lastnosti bukovine (Fagus sylvatica L.) po hidrotermični obdelavi. Iz dveh bukovih hlodov smo izžagali 10 parov radialno orientiranih preizkušancev nominalnih dimenzij 500 mm ... % 160 mm % 12 mm ter jih naravno posušili. Preizkušance smo 1 uro tretirali v nadtlačnem hidrotermičnem procesu pri temperaturi 135 °C. Po uravnovešenju pri 20 °C in 50 % zračni vlažnosti smo preizkušancem določili gostoto, hitrost preleta ultrazvoka v posameznih anatomskih smereh ter barvo po CIELab sistemu. Pri impulznem prečnem mehanskem vzbujanju smo določili še kazalnike akustične kakovosti. Določili smo akustični koeficient (K), dušenje zvoka (tan ▫\delta$▫) in relativno učinkovitost akustične pretvorbe (RACE). Po hidrotermični obdelavi smo potrdili zmanjšanje gostote bukovine ter povečanje hitrosti zvoka in togosti v vseh anatomskih smereh. Mehanska anizotropija lesa se je po obdelavi zmanjšala. Celotne barvne spremembe so bile značilno linearno povezane s spremembo gostote in s tem ohranitvijo togosti bukovine. Kazalniki akustične kakovosti hidrotermično obdelane bukovine so se delno izboljšali. Potrdili smo višji specifični modul elastičnosti in akustični koeficient ter manjše dušenje prečnega nihanja hidrotermično obdelanega lesaSource: Les = Wood. - ISSN 0024-1067 (Letn. 66, št. 2, 2017, str. 5-14)Type of material - article, component part ; adult, seriousPublish date - 2017Language - slovenianCOBISS.SI-ID - 2845577
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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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Žveplan, Ervin | 39652 |
Straže, Aleš | 18149 |
Source: Personal bibliographies
and: SICRIS
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