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Preiskava poškodovane NT lopatice na TA1 : pročilo št. P 26118Kovše, Igor ; Gerdun, Viktor, 1971-Izračunali smo napetosti v trubinski lopatici zaradi centrifugalne sile pri vrtenju in spremembo te napetosti pri spremembi moči turbine, ki se zgodi (največkrat) dvakrat na dan. Izvedli smo ... utrjenostni preskus na vzorcu lopatice, ki smo ga ciklično obremenjevali z natezno silo, ki ustreza najbolj neugodni obremenitvi pri spremembi moči turbine. Iz rezultatov utrujenostnega preiskusa lahko ugotovimo, da do utrujenostnega loma pir takšnem stanju lopatice ne bi prišlo tudi po 41 letih pri najneugodnejših pogojih obratovanja, tj. pri spremembi moči turbine dvakrat na dan, vsak dan v letu. Na majhno verjetnost nastanka utrujenostne razpoke, ki bi lahko povzročila lom lopatice in posledično poškodbe drugih delov turbine kaže tudi dejstvo, da se takšne razpoke niso razvile kljub neugodnim poškodbam na površini (zajede in jamice). Poškodbe so se povečale do takšne mere, da so odpadli manjši delci materiala (slika 1 v prilogi), medtem, ko se razpoke niso razvile. Pri nadaljnji uporabi je možno računati z dodatnim odpadanjem manjših delcev materiala, na podoben način, kot je bilo do sedaj.Type of material - research reportPublication and manufacture - Ljubljana : IMK, april 2004Language - slovenianCOBISS.SI-ID - 26017029
Author
Kovše, Igor |
Gerdun, Viktor, 1971-
Topics
gradbeništvo |
gradbeni materiali |
utrujanje materialov |
numerično modeliranje |
poskusi |
lopatica turbine |
preiskava poškodb
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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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Kovše, Igor | 03630 |
Gerdun, Viktor, 1971- | 21983 |
Source: Personal bibliographies
and: SICRIS
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