Topic
Dynamic Vibration Absorber
About: Dynamic Vibration Absorber is a research topic. Over the lifetime, 4764 publications have been published within this topic receiving 49429 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a nonlinear vibration absorption of a laminated composite beam is investigated with the account of complex environment (moisture and temperature), and a passive efficient nonlinear energy sink (NES) vibration absorber is used to control the transverse vibration.
Abstract: Nonlinear vibration absorption of a laminated composite beam is investigated with the account of complex environment (moisture and temperature). A passive efficient nonlinear energy sink (NES) vibration absorber is used to control the transverse vibration. The generalized Hamilton principle is applied to derive a dynamic model of the laminated composite beam coupled with the NES. Numerical simulations reveal the effects of temperature, moisture, and laying angle on natural frequencies. It is numerically found that the NES can rapidly reduce the vibration amplitude. Then, approximate analytical solutions are sought via the harmonic balance method. The approximate analytical solutions are confirmed by the numerical solutions. Amplitude–frequency response curves show that the NES can reduce the amplitude to very low values for various temperatures, moisture levels, and laying angles. In a certain ranges of the NES parameters, different control effects are determined via an approximate analysis. It is demonstrated that the NES is a promising approach to control vibration of a laminated composite beam in complex environment.
30 citations
TL;DR: In this paper, a new type of damper, tuned particle damper (TPD), is introduced and tested in order to solve the ineffectiveness of conventional PD at vibration acceleration less than the acceleration of gravity (1g) in vertical vibration.
29 citations
TL;DR: In this article, a mass-spring-damperformer system is proposed for both energy harvesting and vibration attenuation, and the optimum parameters of the device for both of these two cases are discussed.
29 citations
TL;DR: In this paper, a hand-held probe with a combined vibration source and ultrasound transducer was used to measure the tissue motion in response to a multi-frequency external vibration source.
Abstract: Vibro-elastography is a new medical imaging method that identifies the mechanical properties of tissue by measuring tissue motion in response to a multi-frequency external vibration source. Previous research on vibro-elastography used ultrasound to measure the tissue motion and system identification techniques to identify the tissue properties. This paper describes a hand-held probe with a combined vibration source and ultrasound transducer to implement the new method as a practical device. The device uses a proportional integral active dynamic vibration absorber with an electromagnetic actuator to counterbalance the reaction forces from contact with the tissue. Experiments show an operational frequency range of 5–2 0 Hz, with at least 15 dB vibration absorption in 0.4 s for single frequency excitation. Experiments with variable frequency and amplitude excitation also show a high level of vibration absorption. DOI: 10.1115/1.2424982
29 citations
TL;DR: In this paper, the authors presented a seismic analysis and energy assessment of building installed with distributed tuned vibration absorbers (d-TVAs) and compared the performance of using a single tuned vibration absorbing (STVA) at the top of the building with the use of the d-TVA.
Abstract: Seismic analysis and energy assessment of building installed with distributed tuned vibration absorbers (d-TVAs) are presented. The performance of d-TVAs is compared with single tuned vibration absorber (STVA) installed at the top of the building. The placements of the d-TVAs are based on the modal properties of the uncontrolled and controlled buildings. The governing equations of motion of the building with the STVA and d-TVAs are solved by employing Newmark’s integration method. Various energies under earthquake ground excitations are computed to study the effectiveness of using the STVA and d-TVAs. It is concluded that the use of the d-TVAs is the most competent because it effectively dissipates the seismic energy, and they are convenient to install requiring reduced space, as are placed at various floors.
29 citations