FONKSİYONEL DERECELENDİRİLMİŞ GÖZENEKLİ SANDVİÇ KİRİŞLERİN ZORLANMIŞ TİTREŞİM ANALİZİ

Ajmal Chopan; Ahmad Reshad Noorı

doi:10.17780/ksujes.1320945

TR EN

FONKSİYONEL DERECELENDİRİLMİŞ GÖZENEKLİ SANDVİÇ KİRİŞLERİN ZORLANMIŞ TİTREŞİM ANALİZİ

Öz

Bu çalışmada, fonksiyonel derecelendirilmiş gözenekli malzemeden yapılmış sandviç kirişlerin elastik ve viskoelastik zorlanmış titreşim davranışı teorik olarak incelenmiştir. Üç tabakadan oluşan sandviç kirişin alt ve üst katmanı izotropik homojen ve çekirdek tabakası ise gözenekli malzemeli olarak modellenmiştir. Modellenen kirişlerin sonlu elemanlar metodu ile analiz edilebilmesi için ANSYS programı kullanılmıştır. Ele alınan yapı elemanlarının sonlu eleman modellerinin kurulması için birinci mertebeden kayma deformasyon etkisine dayalı BEAM189 elemanı kullanılmıştır. Kirişin kesit özelliklerinin üniform olduğu varsayılmıştır. Analizlerde simetrik, üniform ve monolitik olmak üzere üç çeşit gözenek fonksiyonundan faydalanmıştır. Kesit kalınlığı boyunca elastiste modülü ve yoğunluk değişken olarak, Poison oranı ise sabit olarak alınmıştır. Kirişler ankastre – ankastre, ankastre – sabit, sabit – sabit ve ankastre – serbest olarak modellenmiştir. Malzeme değişim katsayısının, malzeme değişim fonksiyonun, çeşitli sınır koşullarının ve sönüm katsayılarının dinamik analiz üzerindeki etkileri detaylı bir şekilde araştırılmıştır. Bu çalışmadan elde edilen sonuçlara göre malzeme gözenek fonksiyonu ve malzeme değişim katsayıları dinamik analizin sonuçlarından genlik ve periyot değerlerini önemli ölçüde etkilediği görülmüştür. Viskoelastik durumunda sönüm oranı arttıkça genlik değerlerinin daha hızlı bir şekilde küçüldüğü gözlemlenmiştir.

Anahtar Kelimeler

FORCED VIBRATION ANALYSIS OF FUNCTIONALLY GRADED POROUS SANDWICH BEAMS

Abstract

In this paper, the elastic and viscoelastic forced vibration behavior of sandwich beams made of functionally graded porous material is investigated theoretically. The bottom and top layers of the sandwich beam consisting of three layers are modeled as isotropic homogeneous and the core layer is modeled as porous material. ANSYS software is used to analyze the modeled beams by the finite element method. BEAM189 element which is based on the first-order shear deformation effect is used to generate the finite element models of the considered structural elements. The cross-sectional properties of the beam are assumed to be uniform. Three types of porosity functions are used in the analysis: symmetric, uniform, and monolithic. The modulus of elasticity and density are taken as variables along the section thickness and the poison ratio is taken as constant. The beams are modeled as clamped-clamped, clamped - pinned, pinned - pinned, and clamped - free. The effects of material variation coefficient, material functions, various boundary conditions, and damping coefficients on the dynamic analysis are investigated in detail. Based on the results obtained from this study, it has been seen that the material function and material distribution coefficients significantly affect the amplitude and period values of the results of dynamic analysis. In the viscoelastic case, it is observed that as the damping ratio increases, the amplitude values decrease more rapidly.

Keywords

References

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Details

Primary Language

Turkish

Subjects

Numerical Modelization in Civil Engineering , Structural Dynamics

Journal Section

Research Article

Authors

Ajmal Chopan
0009-0000-8718-4321
Türkiye

Ahmad Reshad Noorı ^*
0000-0001-6232-6303
Türkiye

Publication Date

December 3, 2023

Submission Date

June 29, 2023

Acceptance Date

October 21, 2023

Published in Issue

Year 2023 Volume: 26 Number: 4

DOI

https://doi.org/10.17780/ksujes.1320945

IZ

https://izlik.org/JA74KB94BH

Cite

RIS / Bibtex

APA

Chopan, A., & Noorı, A. R. (2023). FONKSİYONEL DERECELENDİRİLMİŞ GÖZENEKLİ SANDVİÇ KİRİŞLERİN ZORLANMIŞ TİTREŞİM ANALİZİ. Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, 26(4), 909-921. https://doi.org/10.17780/ksujes.1320945

Cited By

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Karadeniz Fen Bilimleri Dergisi

https://doi.org/10.31466/kfbd.1451491