Jet uçağı ile taşınan bir faydalı yükün yapısal cevabının havacılık yapıları tasarımında kullanımı

Yıl 2022, Cilt: 37 Sayı: 3, 1341 - 1354, 28.02.2022

Engin Metin Kaplan , Erdem Acar , Mehmet Bülent Özer

https://doi.org/10.17341/gazimmfd.898550

Öz

Jet tipi savaş uçağı ile taşınan bir faydalı yükün içindeki ekipmanların yapısal cevabı deneysel olarak çalışılmış, yapay sinir ağları(YSA) ile tahmin edilmiş ve askeri şartnamelerin önerdiği değerler ile karşılaştırılmıştır. Çalışmanın asıl amacı askeri şartnamelerin önerdiği cevap limitlerini, deneysel çalışmalar ile beraber değerlendirmek ve YSA temelli yeni bir yaklaşım önermektir. Çalışmada güdüm kitine sahip kütle ve geometri eşdeğer Mk-83 harp başlığı kullanılmıştır. Yetmiş beş farklı uçuş koşulu YSA eğitimleri için kullanılmıştır. Bu durumlardan ayrı olarak 8 adet uçuş koşulu ise eğitilen ağın testine yönelik kullanılmıştır. İvme verileri uçuş esnasında veri toplama sistemi ile toplanmıştır. Yapısal cevaplar ivme-güç spektrum yoğunluğu(İGTY) olarak frekans bandında işlenmiştir. Ölçümlerden alınan en yüksek yapısal cevap tahmininde normal tolerans limiti yöntemi kullanılmıştır. Yapısal tasarımlarda kullanılan rastgele titreşim tabanlı yükler, frekans-İGSY grafiklerinden üç-sigma kuralı ile 20-300Hz arası veriler dikkate alınarak çıkarılmıştır. Taşıyıcı bir yapısal parça üzerinde YSA tahmini yükleri, test yükleri ve askeri şartname yükleri uygulanarak topoloji eniyilemesi gerçekleştirilmiştir. Eniyileme sonucuna göre YSA tahmini ile elde edilen tasarım, askeri şartnamelerin önerdiği yük ile elde edilen tasarıma göre daha hafif olurken, aynı zamanda yeterli emniyet faktörüne de sahip olduğu gözlenmiştir.

Anahtar Kelimeler

Uçuş Sırasında Titreşim, Faydalı Yük Titreşimi, Yapısal Cevap, MIL-STD-810

Teşekkür

TÜBİTAK SAGE'ye teşekkür ederiz.

Structural Response Prediction and Comparison with Specification of a Payload Carried by a Jet Fighter

Öz

Anahtar Kelimeler

In Flight Vibration, Store Vibration, Structural Response

Kaynakça

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