KENTSEL ORTAMLARDA ÇELİK PANELLERDE PATLAMADAN KAYNAKLANAN DEFORMASYONLARIN SAYISAL ANALİZİ

Abstract

Patlamaya dayanıklı yapılar, patlama etkilerine karşı dayanıklı olabilmeleri için geleneksel sistemler kullanılarak çok ağır ve işlevsiz olacak şekilde tasarlanır. Sonuç olarak, sadece ekonomik olmayan yapıların ortaya çıkması değil, aynı zamanda operasyonel performansları da azalır. Bu zorlukları etkili bir şekilde azaltmak için, önemli miktarda araştırma, patlayıcı yük etkilerine dayanacak şekilde özel olarak tasarlanmış tasarımların ve malzemelerin geliştirilmesine ve uygulanmasına odaklanmıştır. Bu çalışmada, farklı enerjilere sahip patlayıcılar altında çelik plakaların mukavemeti test edilmiştir. İlgili testler Ls-Dyna sonlu elemanlar yazılımı kullanılarak gerçekleştirilmiştir. Sayısal modeli kalibre etmek için deneysel bir literatür kullanılmıştır. Kalibrasyon sonucunda elde edilen sonuçlar deneysel verilerle karşılaştırıldığında yüksek düzeyde bir uyum elde edilmiştir. Kalibre edilmiş sayısal model, panel kalınlıkları değiştirilerek patlama yüklerine tabi tutulmuş ve dinamik tepkileri simüle edilmiştir. Yer değiştirme değerleri, patlayıcılar panel merkezlerinden eşit uzaklıkta yerleştirilerek analiz edilmiştir. Analiz sonuçları karşılaştırılarak patlayıcı enerjileri karşılaştırılmıştır. Aynı miktarda değerlendirilen patlayıcıların panel yüzeylerinde meydana getirdiği değişim miktarına göre en etkili patlayıcı tipleri sıralanabilir. Bu çalışmalar doğrultusunda kentsel alanlarda korunması gereken alanlarda hangi tip patlayıcılara karşı hangi tip çelik malzemenin kullanılacağı hakkında bilgi edinilecektir.

Keywords

• Patlama Direnci
• Sayısal Simülasyon
• Yakın Patlama
• Optimum Tasarım

Numerical Analysis of Explosion-Induced Deformations on Steel Panels in Urban Environments

Abstract

Explosion proof structures are designed to be very heavy and non-functional using conventional systems so that they can be resistant to blast effects. As a result, not only the emergence of non-economic structures, but also their operational performance decreases. To effectively mitigate these challenges, a substantial body of research has focused on the development and application of designs and materials specifically engineered to withstand explosive load impacts. In this study, the strength of steel plates under explosives with different energies was tested. Related tests were performed using Ls-Dyna finite element software. An experimental literature was used to calibrate the numerical model. When the results obtained as a result of the calibration were compared with the experimental data, a high level of agreement was obtained. The calibrated numerical model was subjected to burst loads by varying the panel thicknesses and its dynamic responses were simulated. The displacement values were analyzed by placing the explosives equidistant from the panel centers. By comparing the analysis results, explosive energies were compared. The most effective explosive types could be listed according to the amount of change that the evaluated explosives in the same amount caused on the panel surfaces. In line with these studies, information will be gained about what type of steel materials will be used against which type of explosives in areas that need to be protected in urban areas.

Keywords

• Explosion Resistance
• Numerical Simulation
• Near-field Explosion
• Optimum Design

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