Passive vibration control in mid-frequency region

Jokić, Marko and Ji, Lin and Huang, Zhenyu and Alujević, Neven (2013) Passive vibration control in mid-frequency region. = Passive vibration control in mid-frequency region. In: 11th International Conference on Vibration Problems ICOVP-2013., 9.–12.09. 2013., Lisabon, Portugal.

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This paper deals with passive vibration control of structures exhibiting both long- and short-wavelength deformations within the same frequency range. Such behaviour is often observed in complex build-up structures such as rib-stiffened plates, automotive vehicles, aeroplane fuselages and so on, and is inherent property of any structure comprising of both stiff and flexible structural elements. Addressing both short- and long- wavelength vibrations within the same frequency range is often referred to as the mid-frequency problem, and presents considerable difficulties since it is not amendable for deterministic (e.q. finite element method, FEM) or statistical (statistical energy analysis, SAE) analysis techniques alone. Furthermore, mid-frequency vibrations exhibit intrinsic sensitivity to system uncertainties (e.q. structure variability, uncertainty in boundary conditions). Mid-frequency vibration problem has attracted considerable interest in the past decade, and a number of hybrid FE/SAE methods for predicting the vibration response has been developed. Yet, passive vibration control of the structures exhibiting mid-frequency vibration has not been fully addressed. In this paper, we discuss an optimal passive control technique for a generic mid- frequency vibration problem via multiple tuned mass dampers (TMDs). The problem at hand is tackled as reducer-order optimal H1 control of uncertain system with controller order and structure constraints We address several issues of the proposed approach, such as system uncertainty modelling, applicable optimization algorithms and computational costs. To illustrate the applicability and the efficiency of the proposed approach, we present an example comprising of beam-stiffened plate with multiple TMDs. We also investigate the influence of total TMDs mass, number of TMDs and distribution of individual TMDs resonant frequencies on vibration attenuation efficiency.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Mid-frequency, Vibration control, Rib-stiffened plates
Subjects: TECHNICAL SCIENCE > Aviation, rocket and space technology
Divisions: 200 Department of Engineering Mechanics > 230 Chair of Mechanical Systems Dynamics
600 Department of Naval Engineering and Marine Technology > 620 Chair of Marine Structures Design
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 22 Dec 2016 16:33
Last Modified: 22 Dec 2016 16:33

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