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Goodarzi, Sepehr, Rahi, Abbas. (1404). Torsional vibration reduction of a rotor by using nonlinear dual dynamic vibration absorber. نشریه مهندسی عمران امیرکبیر, (), -. doi: 10.22060/ajme.2025.23992.6169
Sepehr Goodarzi; Abbas Rahi. "Torsional vibration reduction of a rotor by using nonlinear dual dynamic vibration absorber". نشریه مهندسی عمران امیرکبیر, , , 1404, -. doi: 10.22060/ajme.2025.23992.6169
Goodarzi, Sepehr, Rahi, Abbas. (1404). 'Torsional vibration reduction of a rotor by using nonlinear dual dynamic vibration absorber', نشریه مهندسی عمران امیرکبیر, (), pp. -. doi: 10.22060/ajme.2025.23992.6169
Goodarzi, Sepehr, Rahi, Abbas. Torsional vibration reduction of a rotor by using nonlinear dual dynamic vibration absorber. نشریه مهندسی عمران امیرکبیر, 1404; (): -. doi: 10.22060/ajme.2025.23992.6169

Torsional vibration reduction of a rotor by using nonlinear dual dynamic vibration absorber

AUT Journal of Mechanical Engineering
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 29 شهریور 1404
نوع مقاله: Research Article
شناسه دیجیتال (DOI): 10.22060/ajme.2025.23992.6169
نویسندگان
Sepehr Goodarzi1؛ Abbas Rahi* 2
1Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, Tehran, Iran
2Faculty of Mechanical & Energy Engineering, Shahid Beheshti University, A.C., Tehran, Iran
چکیده
Torsional vibrations in rotors can lead to fatigue failure and system instability, making effective vibration control critical for industrial applications. This study proposes nonlinear dual dynamic vibration absorber to mitigate torsional vibrations in a rotor. The absorber consists of two symmetric sets, each comprising a mass, spring, and damper, seamlessly integrated onto the rotor disc for practical implementation. The governing equations of the system are derived using the Lagrangian method and, due to their nonlinearity, solved using the method of multiple scales. The influence of the absorbers' mass and distance ratios on the torsional vibration amplitude at resonance is investigated, revealing that equal mass and distance ratios optimize performance. Specifically, the absorber reduces the vibration amplitude at resonance from 0.03 radians to 0.5 milliradians. The effect of damping on vibration suppression is also analyzed, and a comparison between linear and nonlinear states demonstrates the superior efficacy of the nonlinear approach. Unlike conventional single or linear absorbers, this dual nonlinear design significantly enhances vibration reduction at resonance, offering improved rotor stability and durability for industrial systems.
کلیدواژه‌ها
Nonlinear Dynamic Vibration Absorber؛ Rotor؛ Torsional Vibrations؛ Method of Multiple Scales
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