MEHMET AYDIN KÖMÜR, İBRAHİM ÖZGÜR DENEME

SİMETRİK VE SİMETRİK OLMAYAN ÜÇ BOYUTLU ÇELİK YAPILARIN OPERASYONEL MODAL ANALİZİ

Bu çalışmada laboratuarda inşa edilen biri simetrik diğeri simetrik olmayan iki çelik yapının operasyonel modal analizleri yapılarak dinamik karakteristikleri belirlenmiştir. Bunun için her iki çelik yapıda da altı adet tek eksenli ivmeölçer kullanılmıştır. Çevresel etkilerden yararlanılarak yapılan deneysel ölçüm sonucu elde edilen verilerin değerlendirilmesinde ARTEMİS programında mevcut frekans tanım alanında ayrıştırma ve stokastik altalan belirleme yöntemleri kullanılmıştır. Ayrıca sözkonusu çelik yapılar nümerik olarak da modellenerek mod şekilleri ve doğal frekansları belirlenmiştir. Nümerik ve deneysel sonuçların karşılaştırılmasında birbirine yakın sonuçlar elde edilmiştir.

OPERATIONAL MODEL ANALYSIS OF SYMMETRIC AND ASYMMETRIC THREE DIMENSIONAL STEEL STRUCTURES

In this study, symmetric and asymmetrical steel structures were constructed in the laboratory and analyzed using operational modal analysis to determine the dynamic characteristics. Six different single-axis accelerometers were used for both steel structures. The test results obtained from the environmental excitation were evaluated by ARTEMIS software package which can perform Stochastic Subspace Identification Method and Peak Picking Method. Mode shapes and natural frequencies of the two steel structures were also calculated numerically. A good agreement was observed when the results obtained from experimental and numerical analysis were compared.

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