Optimization of actuator placement for vibration damping in the Prestress-Accumulation release control approach
This contribution 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 semi-active control approach that relies on controlled redistribution of modal energy into high-frequency high-order modes,where it is 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.An example is a short-time decoupling of rotational degrees of freedom in a frame node,so that the bending moments are no longer transferred between the involved beams.If it such a decoupling is performed at the maximum of the shear/bending strain energy of adjacent beams,it results in an almost instantaneous energy release into high-frequency local vibrations and quick dissipation of energy.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,which facilitates quick selection of placements in large structures.
semi-active control damping of vibrations actuator placement smart structures Prestress-Accumulation Release (PAR)
B.Poplawski G.Miku(l)owski G.Suwa(l)a (L).Jankowski
Institute of Fundamental Technological Research,Polish Academy of Sciences,Pawi(n)skiego 5B,02-106 Warsaw,Poland
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
818-827
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）