Vibration mitigation of railway bridges using adaptive damping control
2013 (English)In: Assessment, Upgrading and Refurbishment of Infrastructures, 2013Conference paper (Refereed)
In this paper, the advantage of an adaptive damping system is presented. A damper with variable stiffness is tuned based on estimates of the real-time frequency response, facilitating optimal vibration mitigation. The performance of the developed routines is investigated on an existing tied arch railway bridge. Based on previous field measurements, resonant behaviour of several hangers was found. In combination with low structural damping, the induced stresses resulted in a reduced fatigue service life. Passive dampers are currently installed on the longer hangers, each tuned to the fundamental natural frequency of the individual hanger. However, increased axial force during train passage results in a significant variation in natural frequency, with an apparent risk of detuning the passive dampers. The predicted performance of an adaptive damping system to account for this variation in dynamic behaviour is presented and its potential application is discussed.
Place, publisher, year, edition, pages
Railway bridge dynamics; tuned mass damper; adaptive control; finite element method.
IdentifiersURN: urn:nbn:se:kth:diva-103065OAI: oai:DiVA.org:kth-103065DiVA: diva2:558310
International IABSE Conference, Rotterdam May 6 - 8, 2013
ProjectsLong Life Bridges
FunderEU, FP7, Seventh Framework Programme, 286276
QC 201305072013-05-072012-10-022013-10-04Bibliographically approved