Development and testing of a bi-directional multi-passive tuned mass damper
(English)In: Computer-Aided Civil and Infrastructure Engineering, ISSN 1093-9687, E-ISSN 1467-8667Article in journal (Other academic) Submitted
This paper presentsthe development and testing of a bi-directional multi-passive tuned mass damper(bi-MTMD). A prototype of the damper has been built and tested under laboratoryconditions. The damper was developed for application to a vertical hanger on anexisting tied-arch railway bridge. During train passage, resonance has beenobserved in several hangers, resulting in a reduction in the predicted fatigueservice life. The objective of the damper is to mitigate the vibrations toreduce the resulting stresses and consequently to extend the life of thehanger. The hanger has different natural frequencies for longitudinal andtransversal bending. In addition, a significant difference in natural frequencyis obtained for the loaded and unloaded bridge, due to the increase in axialforce in the hangers. The developed damper accounts for both scenarios and istuned based on previous field measurements. The results from the laboratoryexperiments are compared with a 3D FE-model of the damper.
Tuned mass damper, bi-directional damper, experimental testing, frequency response function, finite element analysis, railway bridge
IdentifiersURN: urn:nbn:se:kth:diva-109488OAI: oai:DiVA.org:kth-109488DiVA: diva2:582609
ProjectsLong Life Bridges
FunderEU, FP7, Seventh Framework Programme, IAPP-GA-2011-286276
QS 20152013-01-052013-01-052015-02-05Bibliographically approved