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Padang Yanuar
Jurusan Magister Teknik Mesin Fakultas Teknik UNDIP Jl. Prof. Sudharto SH Kampus Undip Tembalang Semarang
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Two-Degree-of-Freedom Flow-Induced Vibrations of an Elastically-Mounted Cylinder under Oscillatory Flow: A Numerical Study Riadini, Elfrida Rizky; An-Nizhami, Avicenna; Yanuar, Padang; Yobioktabera, Amran; Lathief, Muttabik Fathul
Jurnal Rekayasa Mesin Vol. 20 No. 3 (2025): Volume 20, Nomor 3, Desember 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i3.7102

Abstract

Flow-Induced Vibration (FIV) in oscillatory flow represents a complex fluid–structure interaction that remains insufficiently explored, particularly for two-degree-of-freedom (2-DoF) systems allowing coupled inline and cross-flow motion. Previous studies have primarily focused on steady flows or limited parameter ranges, leaving a significant knowledge gap in understanding dynamic responses influenced by both reduced velocity ( ) and Keulegan–Carpenter (KC) numbers. This study aims to numerically investigate the vibration characteristics of a 2-DoF circular cylinder subjected to oscillatory flow, emphasizing the coupling mechanism between the two motion directions under varying  and KC values. The research employed a numerical approach based on the Direct Forcing Immersed Boundary (DFIB) method integrated with Navier–Stokes solvers and structural motion equations. Simulations were conducted for KC values of 5–20 and  ranges between 5–35. The temporal integration was performed using the third-order Adams–Bashforth schemes to ensure accuracy and stability. The results reveal that lock-in phenomena occur within specific UR ranges for each KC value, with resonance peaks identified at  = 5 for KC = 5,  = 10 for KC = 10,  = 15 for KC = 15, and  = 20 for KC = 20. Increasing KC values amplify the interaction between flow and structural responses, producing multi-mode vibrations and nonlinear coupling between inline and transverse motions. Furthermore, galloping phenomena were detected at higher UR, indicating a transition from vortex-induced vibration to hydrodynamic instability. These findings contribute to a deeper understanding of FIV dynamics in oscillatory environments, offering insights for optimizing offshore structure design and wave energy harvesting devices.
Co-Authors Abdul Hamid Aditya, Dwiky Septian Agus Pramono Alfauzi, Abdul Syukur Alisyafa’at, Ahmad Dhimas Aminuyati Amran Yobioktabera An Nizhami, Avicenna Andreyanto W, Mirda Anggit, Timotius Antoro, Daffa Yudha Akbar Putra Apriandi, Nanang Apriandi Ardjo, Anwar Sukito Aulia, Nur Fatowil Ayu S, Friska Budhi Prasetiyo Dwiana Hendrawati Elfrida Rizky Riadini Farhan, Muchamad Ghozali, Hanif Faizal Hartono Hartono Hery Tristijanto Huda, Muhamad Nurul Iyadul, Fatih Janitra, Atikah Ayu Khoryanton, Ampala Lathief, Muttabik Fathul Lilin Hermawati Marliyati Marliyati, Marliyati Mulyono Mulyono Nailul Ulum, Muhammad Showi Nanang Apriandi Nanang Budi Sriyanto Nizami, Avicenna An Oktariza, Gio Purnomo, Adhy Putri, Farika Tono Rani Raharjanti Safriana, Eni Saputro, Raynaldi Satito, Aryo Setiawan, Trio Setiyawan, Trio Setyawan, Martando Robby Slamet Priyoatmojo, Slamet Sri Harmanto Sriharmanto, Sriharmanto Sunarto Sunarto Supandi Suwarti Suwarti Tengku Riza Zarzani N Timotius Anggit Kristiawan Tristidjanto, Hery Wahyono Wahyono Wahyu Isti Nugroho Widodo, Ignatius Gunawan Wiwik Purwati Widyaningsih yatimah, Dhurotul Yoeli Janto, Yoeli Yusuf Dewantoro Herlambang Zaenal Abidin