A Correlation Improvement Technique for Model Updating of Structures

ALTUNEL, Fatih | ÇELİK, Mehmet | ÇALIŞKAN, Mahmut

This study proposes a new correlation improvement technique for the optimum node removal location to get improved modal assurance criterion (MAC) matrix. The technique is applied to updating of the finite element model (FEM) of a structure. The developed routine is tried on a utility helicopter. It is proven that it is capable of showing better performance than the coordinate MAC (coMAC), commonly used in such analyses. Commercial software is utilized for the finite element analysis of the helicopter fuselage and tail. Experimental modal analyses are also performed for updating the model for t ...Daha fazlası

Makale 2016 World Scientific Publishing Co. Pte Ltd 6 Görüntülenme

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Evaluation of the development plans between the years 1963 and 2018 in Turkey

AKIN, Elmas

Planning, which means to determine the way in advance, has occured throughout history. The planning process, which includes elements such as determining current sources and evaluating options, is also important because of decreasing inequities and correcting imbalances. After World War II, planning was set as one of the development method. After experiences of economical plans, in 1961, the State Planning Organization (SPO) was founded and made planning more formal in Turkey. Development plans, which have continued with the Development Ministry that was founded in 2011, are important documents ...Daha fazlası

Kitap Bölümü 2016 Peter Lang AG 6 Görüntülenme

Comparison Between The Effects Of Different Types Of Membership Functions On Fuzzy Logic For Hydroxy Dry Cell Performance

IŞIKTAŞ, Abdullah | DİNÇER, Kevser | ATA, Sadık

In this study, hydroxy (HHO) dry cell performances in terms of voltage, current and temperature were modeled with Rule-Based Mamdani-Type Fuzzy (RBMTF) modeling technique. Input parameters plate combination and time, output parameters voltage, current, temperature were described by RBMTF if-the rules. Current, voltage and temperature were measured for the different membership functions. Numerical parameters of input and output variables were fuzzificated as linguistic variables: very very low (L-1), very low (L-2), low (L-3), negative medium (L-4), medium (L-5), positive medium (L-6), high (L- ...Daha fazlası

Konferans Bildirisi 2016 STEF92 TECHNOLOGY LTD 10 Görüntülenme

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Modeling of a helicopter fuselage panel with active vibration control

GÜLBAHÇE, Erdi | ÇELİK, Mehmet

In this study, modeling of a helicopter fuselage panel with active vibration control is carried out. In order to represent the helicopter body shell, a cabin panel clamped from four edges is designed. Piezoelectric patches are attached on the body according to the literature. The dynamic characteristics of the structure are obtained by finite element based modal analysis and exporting of state space matrices. The numerical model of the cabin panel is characterized with regard to active vibration control loop. Vibration data obtained from the helicopter operational tests is applied as a distort ...Daha fazlası

Konferans Bildirisi 2016 Association for Computing Machinery 4 Görüntülenme

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