Farklı kaynak kökü genişliklerine sahip alın kaynaklı alüminyum alaşımlı kirişlerin modal analizi

Yıl 2025, Cilt: 15 Sayı: 3, 753 - 762, 15.09.2025

Muhammet Raci Aydın

https://doi.org/10.17714/gumusfenbil.1681169

Öz

Bu çalışmada, farklı kaynak kök genişliklerinin alın kaynaklı alüminyum alaşımı yapıların titreşim davranışlarına etkisi sayısal yöntemlerle incelenmiştir. 250 mm × 25 mm × 5 mm boyutlarında, serbest-serbest sınır şartlarına sahip referans numune ile 0, 1, 2, 3 ve 4 mm kaynak kök genişliğine sahip V-şeklinde 60° açılı birleşimlere sahip numuneler ANSYS Workbench® sonlu elemanlar yazılımında modellenmiştir. Doğal frekans ve mod şekilleri belirlenmiş, kaynaksız numune için Euler-Bernoulli teorisine göre hesaplanan ilk üç doğal frekans değeriyle karşılaştırma yapılmıştır. İki yöntem arasında iyi bir uyum görülmüştür. Sonuçlar, kaynak bölgesindeki geometrik değişimin kütle-hacim değerleri ve yapısal rijitlik üzerinde etkili olduğunu göstermiştir. 0 mm kök genişliğine sahip numunelerde frekanslar düşerken, 1-4 mm arasında özellikle birinci ve üçüncü doğal frekanslarda artış gözlenmiştir. 4 mm kök genişliğine sahip numune ile referans numunesi arasında maksimum %1,34’lük bir fark tespit edilmiştir. Kaynaklı bölgenin node bölgesine denk geldiği ikinci mode şeklinde ikinci doğal frekans değeri değişmemiştir. Bu çalışmanın yeniliği, farklı kaynak kök genişliklerinin titreşim davranışı üzerindeki etkisinin araştırılmasıdır. Gelecekte farklı malzeme ve kaynak parametreleri kullanılarak teorik, sayısal ve deneysel çalışmalar yürütülecektir.

Anahtar Kelimeler

Al alaşımlı kiriş , Alın kaynağı , Euler-Bernoulli , Modal analiz , Mod şekilleri , Doğal frekans

Modal analysis of butt-welded aluminum alloy beams with different welding root widths

Öz

In this study, the effect of different welding root widths on the vibrational behavior of butt-welded aluminum alloy structures was investigated using numerical methods. Specimens with dimensions of 250 mm × 25 mm × 5 mm and free-free boundary conditions were modeled in ANSYS Workbench® finite element software, including a weld-free reference specimen and specimens with V-shaped joints at a 60° angle having welding root widths of 0, 1, 2, 3, and 4 mm. Natural frequencies and mode shapes were determined and the first three natural frequencies of the unwelded specimen were calculated based on the Euler-Bernoulli beam theory for comparison. A good agreement was observed between the two methods. The results indicated that geometric variations in the welding region affect the mass-volume values and structural stiffness. In specimens with 0 mm root width, frequency values decreased, while an increasing trend in the first and third natural frequencies was observed for root widths between 1-4 mm. A maximum change of 1.34% was found between the 4 mm welding root specimen and the reference. The second natural frequency remained unchanged, as the welded region corresponded to the node location of the second mode shape. This study is novel in that it investigates the effect of different root widths on vibration behavior. In the future, theoretical, numerical, and experimental studies will be conducted using different material and welding parameters.

Anahtar Kelimeler

Al alloy beam , Butt weld , Euler-Bernoulli , Modal analysis , Mode shapes , Natural frequency

Etik Beyan

The author declares that this study does not require ethical committee approval or any legal permission.

Kaynakça

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