Experimental and theoretical stability analysis of damped auto-parametric pendulum

0348113 - ÚTAM 2011 RIV CZ eng C - Conference Paper (international conference)
Pospíšil, Stanislav - Fischer, Cyril - Náprstek, Jiří
Experimental and theoretical stability analysis of damped auto-parametric pendulum.
Engineering Mechanics 2010. Prague: Institute of Thermomechanics AS CR, v. v. i., 2010 - (Zolotarev, I.), s. 111-123. ISBN 978-80-87012-26-0.
[Engineering Mechanics 2010. Svratka (CZ), 10.05.2010-13.05.2010]
R&D Projects: GA ČR(CZ) GA103/09/0094; GA ČR(CZ) GC103/07/J060; GA AV ČR(CZ) IAA200710805; GA AV ČR(CZ) IAA2071401
Institutional research plan: CEZ:AV0Z20710524
Keywords : damped pendulum * experimental device * autoparametric system
Subject RIV: JM - Building Engineering

The article describes an experimental and theoretical treatment of the auto-parametric pendulum damper modelled as a double-degree-of-freedom (DDOF) system. It is strongly non-linear, with the harmonic excitation being applied in the suspension point and interpreted for instance as an excitation by wind. The stability of the motion in a vertical plane is analysed in the meaning of semi-trivial vibration. This effect of stability loss and possible stability regain is very important from practical point of view, because the motion of an damper beyond the stability limits may act negatively and thus endanger the structure itself. Special experimental frame was developed.The stability of the system is analysed experimentally and compared with theoretical results.
Permanent Link: http://hdl.handle.net/11104/0188725