Parametric optimization and dynamic performance of rocking double-tuned mass damper

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (9) : 275-283.

DU Yongfeng1,2, LI Weifeng1, LI Hu1

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Abstract

This paper proposes a rocking dual-tuned mass damper (RDTMD) with a wider frequency modulation width. Firstly, the dynamic equation of the single-degree-of-freedom RDTMD vibration reduction system under the action of simple harmonic excitation is established, and the expression of its displacement dynamic amplification coefficient is derived. Then, based on the optimization evaluation function of RDTMD, the parameter optimization program is compiled to obtain the global RDTMD The optimal parameters and conditional optimal parameters; then, the influence law of each parameter of the damper on the system dynamic amplification factor and frequency modulation width is discussed, and the key parameters affecting its robustness are analyzed; finally, with the traditional DTMD, MTMD , The vibration reduction effect and robustness of TMD were compared and analyzed. The analysis results show that the use of RDTMD to control the structure can effectively reduce the dynamic response of the main structure; the wider frequency modulation width of RDTMD improves the damper's ability to control the high-order vibration shapes of the main structure; when the impact on the robustness of the device is greater. In terms of the natural frequency of the main structure, the robustness of RDTMD is obviously better than other similar dampers, and it is an ideal vibration reduction control device.

Key words

rocking double-tuned mass damper / parameter optimization / vibration control / vibration damping performance / robustness

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DU Yongfeng1,2, LI Weifeng1, LI Hu1. Parametric optimization and dynamic performance of rocking double-tuned mass damper[J]. Journal of Vibration and Shock, 2023, 42(9): 275-283

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