Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Active buckling control of an imperfect beamcolumn with circular crosssection using piezoelastic supports and integral LQR control
 Bonisoli, E. ; Institute of Physics IOP, London: 13th International Conference on Motion and Vibration Control, MOVIC 2016 and the 12th International Conference on Recent Advances in Structural Dynamics, RASD 2016 : 46 July 2016, Southampton, UK Bristol: IOP Publishing, 2016 (Journal of physics. Conference series 744) ISBN: 9781510830578 Art. 012165, 13 S. 
 International Conference on Motion and Vibration Control (MOVIC) <13, 2016, Southampton> International Conference on Recent Advances in Structural Dynamics (RASD) <12, 2016, Southampton> 

 Englisch 
 Konferenzbeitrag, Elektronische Publikation 
 Fraunhofer LBF () 
Abstract
For slender beamcolumns loaded by axial compressive forces, active buckling control provides a possibility to increase the maximum bearable axial load above that of a purely passive structure. In this paper, the potential of active buckling control of an imperfect beamcolumn with circular crosssection using piezoelastic supports is investigated numerically. Imperfections are given by an initial deformation of the beamcolumn caused by a constant imperfection force. With the piezoelastic supports, active bending moments in arbitrary directions orthogonal to the beamcolumn's longitudinal axis can be applied at both beam column's ends. The imperfect beamcolumn is loaded by a gradually increasing axial compressive force resulting in a lateral deformation of the beamcolumn. First, a finite element model of the imperfect structure for numerical simulation of the active buckling control is presented. Second, an integral linearquadratic regulator (LQR) that compensate s the deformation via the piezoelastic supports is derived for a reduced modal model of the ideal beamcolumn. With the proposed active buckling control it is possible to stabilize the imperfect beamcolumn in arbitrary lateral direction for axial loads above the theoretical critical buckling load and the maximum bearable load of the passive structure.