Optimization method for distributed dynamic vibration absorbers applied in vibration reduction of damped thin plate structures

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (11) : 75-79.

ZHU Xuezhi 1 LIU Xiaoxiang 2 JIAO Yinghou 1 CHEN Zhaobo 1

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Abstract

When a dynamic vibration absorber (DVA) is used for vibration reduction, its parameters need to be optimized to obtain the optimal vibration reduction effect. At present, there is no simple optimization method for distributed DVAs used for vibration reduction of damped continuous structures. Here, the parametric optimization method for distributed DVAs to suppress vibrations of damped thin plate structures with multiple natural vibration modes was studied. The dynamic equations for a damped thin plate with distributed DVAs were established according to the modal superposition method. Based on vibration characteristics of DVAs, simplified 2-DOF equations of motion for the damped thin plate with DVAs were derived. Combining with the solving method for optimal tuning parameters of DVA in a damped linear system, the analytical optimization formulas for distributed DVAs’ parameters were deduced. Their effectiveness was verified with numerical calculations. Numerical calculation results showed that the deduced optimization formulas have a good optimization effect on distributed DVAs to suppress vibrations with lower frequencies of damped plate structures containing multiple natural vibration modes.

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Optimization / Distributed DVAs / Damped plates / Vibration suppression

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ZHU Xuezhi 1 LIU Xiaoxiang 2 JIAO Yinghou 1 CHEN Zhaobo 1 . Optimization method for distributed dynamic vibration absorbers applied in vibration reduction of damped thin plate structures[J]. Journal of Vibration and Shock, 2019, 38(11): 75-79

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