Adaptive electromagnetic vibration absorber for a multimode structure

Mohamed, Khaled S. (author), Amri, Fatin (author), Elboraey, Mostafa (author), Nordin, N.H. Diyana (author), Muthalif, Asan (author)

All structures experience vibrations due to external dynamic force excitations, such as earthquakes and wind loadings. At resonance, the impact of this natural dynamic force on structures may lead to structural failures. Hence, an absorber is mounted to absorb vibrations from the primary system. Unfortunately, passive tuned mass absorbers can only target a single frequency. Since structural buildings possess multiple modes, an adaptive or tune-able vibration absorber is needed to attenuate the vibration in a multi-degree of freedom (MDOF) system. In this work, an adaptive electromagnetic vibration absorber (AEMVA) is proposed to eliminate the effects of vibrations and is dynamically tuned using electromagnets. By varying the current supplied to the coil, the stiffness of the AEMVA can be adjusted, resulting in a varying absorber frequency. A mathematical description of the AEMVA on a three-story prototype model building is also presented. The three-story benchmark model was used to demonstrate the effectiveness of AEMVA in absorbing multiple vibration modes, both analytically and experimentally. It is shown that 68.81 %, 50.49 %, and 33.45 % of vibration amplitude reductions were achieved at the first, second, and third modes, respectively.

• Language: English
• Keywords: adaptive vibration absorbers, electromagnetic vibration absorbers, multimode systems, dynamic modelling, structural vibration control
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Publication date: 01.03.2022
• Year: 2022
• Number of pages: Str. 191-199
• Numbering: Vol. 68, no. 3
• PID: 20.500.12556/RUL-136405
• UDC: 531.38/.39
• ISSN on article: 0039-2480
• DOI: 10.5545/sv-jme.2021.7458
• COBISS.SI-ID: 105884675
• Publication date in RUL: 29.04.2022

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Secondary language

• Language: Slovenian
• Title: Adaptivni elektromagnetni blažilnik vibracij za večmodalne konstrukcije
• Keywords: adaptivni blažilniki vibracij, elektromagnetni blažilniki vibracij, večmodalni sistemi, dinamično modeliranje, nadzor nad vibracijami, analiza v frekvenčni domeni, mehanski model vibracij

Projects

• Funder: Other - Other funder or multiple funders
• Funding programme: Qatar University Student
• Project number: QUST-2-CENG-2020-3