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Farklı Standartlara Göre Silo Cidarı Üzerindeki Gerilme Değişimlerinin ANSYS ile İncelenmesi
(The Investigation with ANSYS of Stress Changes on Silo Wall According to Different Standards )

Author : Hakan KİBAR  Turgut ÖZTÜRK  
Type :
Printing Year : 2013
Number : 2013-2
Page : 94-110


Summary
Bu çalışmada Giresun ili koşullarında tombul fındık depolamasında kullanılabilecek silindirik gövdeli, konik çıkış ağızlı, çelik konstrüksiyon silo için optimum silo boyutları araştırılmıştır. Çalışmada 1635 ton depolama kapasitesine sahip silo için 10, 11, 12, 13, 14, 15 ve 20 mm cidar kalınlıkları ele alınmıştır. Bu amaçla Eurocode 1 ve Avustralya standartları kullanılarak silo cidarı yüzeyine etki eden basınç yükleri (düşey, yatay, sürtünme çekmesi basınç yükü) farklı cidar kalınlıkları için doldurma ve boşaltma koşullarında hesaplanmıştır. Hesaplanan bu basınç yükleri ANSYS 14.0 sonlu eleman yazılım programına girilerek cidar yüzeyinde farklı doğrultularda meydana gelen gerilmeler saptanmıştır. Çalışmada doldurma koşullarında düşey basınç yükünün neden olduğu gerilmeler açısından 10, 11 ve 12 mm cidar kalınlıklarının emniyetli olmadığı belirlenmiştir. Herhangi bir yapısal soruna neden olmayacak optimum silo boyutları; depolama kapasitesi ve maksimum von Mises gerilmeleri göz önüne alındığında 13 mm cidar kalınlığı olarak ortaya çıkmaktadır. Silindirik gövdeli ve konik çıkış ağızlı bu silo Tombul fındık depolamasında mühendislik açıdan en uygun özellikleri ortaya koymaktadır. Önerilen bu silo tipinin Avustralya standardına (AS 3774) göre yapılan analizi sonucunda da (silo cidarı yüzeyine etki eden basınç yükleri açısından) emniyetli olduğu gözlemlenmiştir.

Turkish Keywords
ANSYS sonlu eleman yazılımı, AS 3774, Eurocode 1, silo, Tombul fındık

Abstract
In this study, the optimal dimensions of the silo were investigated for barrel-type cylinder, conical outlet, steel construction silo which used in Tombul hazelnut storage in the Giresun province conditions. 10, 11, 12, 13, 14, 15 ve 20 mm wall thickness for 1635 tons storage capacity silo were examined in the study. For this purpose, pressure loads acting on the silo wall surface (vertical, horizontal, friction traction pressure load) using Eurocode 1 and Australian standards were calculated for different wall thicknesses at filling and discharge conditions. This calculated pressure loads by entering in ANSYS finite element software program, stresses which occurring in different directions on the surface of wall was determined. In the study, it was determined that 10, 11 and 12 mm wall thickness were not reliable in terms of stresses caused vertical pressure load in the filling conditions. The optimum silo dimensions will not lead to any structural problem are emerging as the silo which has 13 mm wall thickness when considering storage capacity and the maximum von Mises stresses. This silo with barrel-type cylinder and conical outlet shows the most appropriate features in terms of engineering in Tombul hazelnut storage. At the result of the analysis according to Australian standard (AS 3774) of proposed this type of silo was observed to be reliable (in terms of pressure loads acting on the surface of the silo wall).

Keywords
ANSYS finite element software, AS 3774, Eurocode 1, silo, Tombul hazelnut

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