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논문 기본 정보

자료유형
학술저널
저자정보
Blazej Poplawski (Institute of Fundamental Technological Research) Grzegorz Mikułowski (Institute of Fundamental Technological Research) Dominik Pisarski (Institute of Fundamental Technological Research) Rafał Wiszowaty (Institute of Fundamental Technological Research) Łukasz Jankowski (Institute of Fundamental Technological Research)
저널정보
국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.24 No.1
발행연도
2019.1
수록면
27 - 35 (9page)

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This paper proposes a quantitative criterion for optimization of actuator placement for the Prestress–Accumulation Release (PAR) strategy of mitigation of vibrations. The PAR strategy is a recently developed semi-active control approach that relies on controlled redistribution of vibration energy into high-order modes, which are high-frequency and thus effectively dissipated by means of the natural mechanisms of material damping. The energy transfer is achieved by a controlled temporary removal of selected structural constraints. This paper considers a short-time decoupling of rotational degrees of freedom in a frame node so that the bending moments temporarily cease to be transferred between the involved beams. We propose and test a quantitative criterion for placement of such actuators. The criterion is based on local modal strain energy that can be released into high-order modes. The numerical time complexity is linear with respect to the number of actuators and potential placements, which facilitates quick analysis in case of large structures.

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