Makine Mühendisliği Bölümü Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.11779/1944

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Department: search.filters.department.Mühendislik Fakültesi, Makine Mühendisliği BölümüPublisher: search.filters.publisher.JVE INTERNATIONAL LTD.

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  • Article
    Citation - WoS: 1
    Citation - Scopus: 2
    1441. Quantification of the Flow Noise in Household Refrigerators
    (JVE INTERNATIONAL LTD., 2014) Körük, Hasan; Körük, Hasan; Bilgin, Necati; 02.03. Department of Mechanical Engineering; 02. Faculty of Engineering; 01. MEF University
    The flow noise in household refrigerators is quantified in this study. First, the sound pressure measurements in a quiet room using typical household refrigerators are conducted and the noise characteristics of the refrigerators are presented. Then, the flow noise in household refrigerators is quantified using the results of the overall analysis and Fourier transform of the measured sound pressure data. After that, the flow noise in household refrigerators is quantified using the sound pressure measurements conducted using a specially designed test rig. The frequency characteristics of the flow noise in household refrigerators are also explored and the contribution of the flow noise is identified.
  • Article
    Citation - WoS: 12
    Citation - Scopus: 18
    Quantification and Minimization of Sensor Effects on Modal Parameters of Lightweight Structures
    (JVE INTERNATIONAL LTD., 2014) Körük, Hasan; Körük, Hasan; 02.03. Department of Mechanical Engineering; 02. Faculty of Engineering; 01. MEF University
    This paper aims to quantify the adverse effects of contact type sensors on modal parameters of lightweight structures and to present a practical way for identification of modal parameters of structures with minimal sensor effects. The adverse effects of a contact type sensor on natural frequencies, damping levels and mode shapes are explored using the theoretical model of a typical beam-like sample carrying a sensor and a controlled experimental study based on measurement of frequency response functions using non-contact excitation and response sensors. The half-power and circle fit modal identification methods are used to extract modal parameter from measured data. The experimental and theoretical modal analysis results are evaluated, and a practical methodology based on classical acoustic and vibration frequency response functions is suggested to identify modal loss factors and natural frequencies of lightweight structures with minimal sensor effects.