Experimental and theoretical analysis of stability autoparametric pendulum with viscous dampers

0346352 - ÚTAM 2011 RIV GB eng C - Conference Paper (international conference)
Pospíšil, Stanislav - Náprstek, Jiří - Fischer, Cyril
Experimental and theoretical analysis of stability autoparametric pendulum with viscous dampers.
Proc. of the 10th International conference RASD 2010. Southampton: University of Southampton, Institute of sound and vibration research, 2010 - (Brennan, M.), s. 12-21. ISBN 9780854329106.
[International conference RASD 2010 /10./. Southampton (GB), 12.07.2010-14.07.2010]
R&D Projects: GA ČR(CZ) GA103/09/0094; GA ČR(CZ) GC103/07/J060; GA AV ČR(CZ) IAA2071401; GA AV ČR(CZ) IAA200710805
Institutional research plan: CEZ:AV0Z20710524
Keywords : auto-parametric pendulum * variable damping * semi-trivial stability
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.
Permanent Link: http://hdl.handle.net/11104/0187404