A robust equal-peak method for uncertain mechanical systems. (3rd February 2018)

• Record Type: Journal Article
• Authors: Dell'Elce, L.; Gourc, E.; Kerschen, G.
• Is Part Of: Journal of sound and vibration. Volume 414(2018)
• Page Start: 97
• Page End: 109
• Publication Date: 2018-02-03
• Subjects: Vibration absorber -- Uncertain mechanical system -- Equal-peak method -- Scenario approach; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2017.10.038
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: The linear vibration absorber is a widely-used vibration mitigation device. However, when the absorber is tuned according to Den Hartog's equal-peak method, the resulting narrow bandwidth may decrease its effectiveness, especially when the host structure is uncertain or in the presence of environmental variability. In this paper, a new tuning strategy of the linear absorber, based on the concept of robust equal peaks, is introduced for mitigating a specific resonance of an uncertain mechanical system. Both analytical and numerical investigations are carried out to demonstrate the robustness of the proposed absorber. For 20% uncertainty in the stiffness of the host system, the performance improvement brought by the robust equal-peak method amounts to more than 30% with respect to Den Hartog's tuning rule.