Tuned vibration absorber design for a supported hollow cylindrical structure

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Makina Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2015

Öğrenci: TUĞRUL AKSOY

Danışman: GÖKHAN OSMAN ÖZGEN

Özet:

Supported hollow structural elements have a usage area in various types of structures or machines. They exhibit an oscillatory behavior under various excitations since their modal frequencies are quite low. This behavior results in vibrations which reach huge amplitudes especially at the tip of the structures. This situation may be harmful for the structural integrity of the structures and may reduce the service life. Moreover, these vibrations can distort the performance of the machines’ which involve the supported hollow structure. In this thesis study, a tuned vibration absorber (also called as tuned mass damper) design is proposed to suppress the vibrations of a supported hollow cylindrical structure under impulsive loading. Within the scope of this study, a tuned vibration absorber (TVA) designed and applied on a sample supported hollow cylinder structure. Then, the mitigation in vibration amplitudes as a result of this application is investigated. In order to see the effectiveness of the TVA application, a physical structure involving a supported hollow cylindrical structure is designed and manufactured. TVA is designed by considering the modal parameters of this physical structure and applied on it. Experiments are carried out in order to verify the effectiveness of the TVA application on the dynamics of the system. After then, dynamic test are carried out on the system and the mitigation in vibration levels is investigated as the result of the TVA application.