Fonksiyonel derecelendirilmiş ortotropik bir kirişin statik ve titreşim davranışlarının incelenmesi

Şeref Doğuşcan Akbaş

Öz


Bu çalışmada, fonksiyonel derecelendirilmiş konsol bir kirişin statik ve serbest titreşim davranışları ortotropik malzeme modeli kullanılarak incelenmiştir. Fonksiyonel derecelendirilmiş kirişin incelenmesinde düzlem parçalı sürekli ortam modeli kullanılmış olup, sonlu elemanlar yöntemi uygulanmıştır. Probleme ait yönetici denklemleri, virtüel yer değiştirmeler prensibi ile elde edilmiştir. Kirişin malzeme özellikleri, kiriş yüksekliği boyunca belli bir fonksiyona bağlı olarak belirlenmiştir. Ele alınan kirişin boyutları, levha modeli olacak biçimde seçilerek düzlem gerilme problemi uygulanmıştır. Söz konusu problemin, sonlu elemanlar formülasyonları elde edilip, sonlu eleman çözümü için MATLAB programında algoritma ve program yazılarak sonuçlar elde edilmiştir. Ele alınan çalışmada, farklı malzeme dağılımlarının, kirişin statik ve titreşim davranışına olan etkileri incelenmiştir. Değişik malzeme dağılımlarına göre, en büyük yer değiştirmeler ve doğal frekanslar elde edilip, yorumlanmıştır.


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