[95] Numerical and experimental studies of pendulum dynamic vibration absorber for structural vibration
작성자 관리자
날짜 2023-12-27 15:13:46
조회수 76
S. I. Ha and G. H. Yoon. Journal of Vibration and Acoustics 143, no. 1 (2021).
This research presents a new type of pendulum dynamic vibration absorber (PDVA) shown in Fig. 1 consisting of a spring and a mass to attenuate structural vibrations at two resonance frequencies of hosting structure. It is a convention to attach many dynamic absorbers to a structure to attenuate vibration at multiple frequencies and inevitably it increases the mass and the cost. Therefore, the reduction of the number of vibration absorbers at multiple excitation frequencies is an important issue. To reduce the number of vibration absorbers, this research employs the pendulum phenomenon with a dynamic vibration absorber consisting of a mass and a spring whose length is subject to be changed during vibration. As the present PDVA is composed of a spring, a mass, and damper, the structural vibrations at the two resonance frequencies, i.e., the square root of stiffness over mass and the square root of a length over gravidity, can be simultaneously attenuated with PDVA. As the length of the spring of the present PDVA is varied due to its vibration, it is also possible to increase the frequency ranges of the dynamic vibration absorbers. To show the efficiency of the present PDVA, this research carries out several numerical simulations and experiments.
| 첨부파일 |
|---|