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Design of double dynamic vibration absorbers for reduction of two DOF vibration system
Lovely Son,Mulyadi Bur,Meifal Rusli,Adriyan 국제구조공학회 2016 Structural Engineering and Mechanics, An Int'l Jou Vol.57 No.1
This research is aimed to design and analyze the performance of double dynamic vibration absorber (DVA) using a pendulum and a spring-mass type absorber for reducing vibration of two-DOF vibration system. The conventional fixed-points method and genetics algorithm (GA) optimization procedure are utilized in designing the optimal parameter of DVA. The frequency and damping ratio are optimized to determine the optimal absorber parameters. The simulation results show that GA optimization procedure is more effective in designing the double DVA in comparison to the fixed-points method. The experimental study is conducted to verify the numerical result.
Serial pendulum DVA design using Genetic Algorithm (GA) by considering the pendulum nonlinearity
Lovely Son,Firman Erizal,Mulyadi Bur,Agus Sutanto 국제구조공학회 2024 Structural Engineering and Mechanics, An Int'l Jou Vol.89 No.6
A serial pendulum dynamic vibration absorber (DVA) was designed to suppress the vibration of two degrees of freedom (Two-DOF) structure model. The optimal DVA parameters are selected using a genetic algorithm (GA) by minimizing the fitness function formulated from the system’s frequency response function (FRF). Two fitness function criteria, using one and two target frequency ranges, were utilized to calculate the optimal DVA parameters. The optimized serial pendulum DVA parameters were used to reduce structural vibration under free and forced excitation conditions. The simulation study found that the serial pendulum DVA can effectively reduce the vibration response for a small excitation amplitude. However, the DVA performance decreases for a large excitation amplitude due to the nonlinearity of pendulum motion, and the percentage of vibration response attenuation is smaller than that obtained using a small excitation amplitude.