EKSENEL TABAKALI FONKSİYONEL DERECELENDİRİLMİŞ KONİK KİRİŞLERİN SAYISAL İLK MOD FREKANS ANALİZİ

Year 2018, , 399 - 406, 31.01.2018

Savaş Evran

https://doi.org/10.28948/ngumuh.387248

Cited By: 1

Abstract

   Bu numerik çalışmanın amacı, ANSYS V13 sonlu
elemanlar programı kullanarak ankastre-ankastre (C-C) sınır şartı altında
eksenel yönde fonksiyonel derecelendirilmiş malzemeden (FDM) modellenmiş üç
tabakalı konik kirişlerin birinci mod frekans analizini değerlendirmektir.
Analizler üç seviye ve üç kontrol faktöründen oluşan L16 Taguchi ortogonal dizi
tasarımı kullanılarak yürütülmüştür. Tabakalar kontrol faktörleri olarak karar
verilmiştir ve alüminyum (Al) / monotungsten karbür (WC) sistemlerinden
oluştuğu düşünülmektedir. Optimum tabaka kombinasyonu sinyal gürültü oran
analizine göre gerçekleştirildi. Eksenel tabakalı FD konik kirişlerin birinci
mod frekansı üzerinde tabakaların önem seviyeleri ve katkı oranları varyans
analizi (ANOVA) kullanılarak incelenmiştir. Birinci mod frekans değerleri
üzerinde Tabaka 1 ve Tabaka 3 pozitif etkilere sahiptir. Ancak Tabaka 2 negatif
etkiye sahiptir. Ayrıca en etkili tabakalar sırasıyla %82,17 ile Tabaka 1, %16,36
ile Tabaka 2 ve %1,45 ile Tabaka 3’tür. 

Keywords

Fonksiyonel derecelendirilmiş malzemeler, konik tabakalı kirişler, sonlu elemanlar metodu

NUMERICAL FIRST MODE FREQUENCY ANALYSIS OF AXIALLY LAYERED FUNCTIONALLY GRADED TAPERED BEAMS

Abstract

   The purpose of this numerical
work is to evaluate the first mode frequency analysis of the tapered beams with
three layers, modelled using functionally graded materials (FGM) in the axially
direction, under clamped-clamped (C-C) boundary condition based on finite
element software named ANSYS V13. Analyses were conducted using L16 Taguchi
orthogonal array design consisting of three control factors and four levels.
The layers were determined as the control factors and were considered to be
made from aluminum (Al)/monotungsten carbide (WC) systems. The optimum layer
combination was carried out according to the analysis of signal-to-noise (S/N)
ratio. The importance levels and contribution ratios of the layers on the first
mode frequency of the axially layered FG tapered beams were observed by using
analysis of variance (ANOVA). Layer 1 and Layer 3 have positive effects on the
first mode frequency values. However, Layer 2 has negative influence. In
addition, the most effective layers are Layer 1 with 82.17%, Layer 2 with
16.36% and Layer 3 with 1.45% respectively. 

Keywords

Functionally graded materials, tapered layered beam, finite element method

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