رسالة جامعية
Optimization of dynamic behaviour of advanced active structures ; Optimizacija dinamičkoga ponašanja naprednih aktivnih konstrukcija
| العنوان: | Optimization of dynamic behaviour of advanced active structures ; Optimizacija dinamičkoga ponašanja naprednih aktivnih konstrukcija |
|---|---|
| المؤلفون: | Čakmak, Damjan |
| المساهمون: | Alujević, Neven |
| بيانات النشر: | Sveučilište u Zagrebu. Fakultet strojarstva i brodogradnje. University of Zagreb. Faculty of Mechanical Engineering and Naval Architecture. |
| سنة النشر: | 2020 |
| المجموعة: | Nacionalni repozitorij disertacija i znanstvenih magistarskih radova (Nacionalna i sveučilišna knjižnica u Zagrebu) / Croatian Digital Dissertations Repository (National and University Library in Zagreb) |
| مصطلحات موضوعية: | vibration isolation, inerter, active vibration control, direct velocity feedback, stability of active control systems, optimization of vibration control systems, fatigue life, helical spring, finite element method, h2 optimization, stress correction factor, displacement correction factor, izolacija vibracija, aktivna kontrola vibracija, povratna veza po brzini vibracija, stabilnost aktivnih sustava, optimizacija dinamičkih sustava, zamor, zavojna opruga, metoda konačnih elemenata, H2 optimizacija, korekcijski faktor naprezanja, korekcijski faktor pomaka, TEHNIČKE ZNANOSTI. Strojarstvo, TECHNICAL SCIENCES. Mechanical Engineering, Strojarstvo. Nuklearna tehnika. Strojevi, Mechanical engineering. Nuclear technology. Machinery, info:eu-repo/classification/udc/621(043.3) |
| الوصف: | The subject of this research is the improvement of the dynamic behaviour of structures using passive and active approaches to vibration control by using inerters. Inerter is a relatively new element in the theory of mechanical networks. It is a mechanical device that generates force proportional to the relative acceleration between its terminals. The use of inerters is still relatively unexplored and offers many new possibilities of reducing unwanted vibration effects, which is of particular importance in the resonant working conditions of the structure. In the first part of the thesis, passive linear dynamic systems are considered. In the second part, the passive systems are enhanced by the active control. Stability analysis of the active systems is performed. In addition to the parameters that ensure stable operation of the system, the optimization of vibration behaviour of active structures is carried out. The main optimization criterion used is the minimization of the specific kinetic energy of system vibration in a broad frequency band. Throughout the work, analytical and numerical methods are combined, depending on the complexity of the considered system. The achieved results are compared through discussion on the usefulness of the active control and inerter implementation, depending on the system considered. The motivation for the work are synergistic effects regarding the utilization of inerters in parallel with active control systems. The result of the research is a development of new methods for passive and active vibration control. Furthermore, it is shown that employing the inerter in isolation systems can yield with substantial improvements in fatigue life of isolator coupling components, i.e. springs. Novel cylindrical helical spring stress and displacement correction factors are proposed. ; Tema istraživanja vezana je uz poboljšanje dinamičkog ponašanja konstrukcija koristeći pasivni i aktivni pristup redukciji vibracija uz uporabu inertera. Inerter je relativno novi element u teoriji mehaničkih ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://dr.nsk.hr/islandora/object/fsb:5612Test; https://urn.nsk.hr/urn:nbn:hr:235:044764Test; https://repozitorij.unizg.hr/islandora/object/fsb:5612Test; https://repozitorij.unizg.hr/islandora/object/fsb:5612/datastream/PDFTest |
| الإتاحة: | https://dr.nsk.hr/islandora/object/fsb:5612Test https://urn.nsk.hr/urn:nbn:hr:235:044764Test https://repozitorij.unizg.hr/islandora/object/fsb:5612Test https://repozitorij.unizg.hr/islandora/object/fsb:5612/datastream/PDFTest |
| حقوق: | http://rightsstatements.org/vocab/InC/1.0Test/ ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.22B3E05D |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |