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Dynamic properties of impact hammer operator and their influence on dynamics of lightweight structures
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Wei, Xiaojun, Zhang, Jingwei, Živanović, Stana, Liu, Jingliang, Russell, Justin and He, Xuhui (2022) Dynamic properties of impact hammer operator and their influence on dynamics of lightweight structures. Journal of Sound and Vibration, 529 . 116932. doi:10.1016/j.jsv.2022.116932 ISSN 0022-460X.
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Official URL: https://doi.org/10.1016/j.jsv.2022.116932
Abstract
This paper considers the dynamics of a human in a crouching posture (assumed during manual impact hammer tests) and their influence on system dynamics. Intra-subject and inter-subject statistics for the dynamics of crouching humans are determined for three and nine test subjects, respectively. The average hammer operator's undamped natural frequency was 3.49 Hz with a damping ratio of 13.7%. Knowledge of the hammer operator dynamics is then utilised to identify the dynamic properties of the supporting structure in an unoccupied state. The results are verified on two fibre-reinforced polymer composite footbridges. Criteria for identifiability of the hammer operator-structure interaction are presented and used to identify bridge properties for which the hammer operator's influence on the structure can be compensated for.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
SWORD Depositor: | Library Publications Router | ||||||||
Journal or Publication Title: | Journal of Sound and Vibration | ||||||||
Publisher: | Elsevier Ltd. | ||||||||
ISSN: | 0022-460X | ||||||||
Official Date: | 7 July 2022 | ||||||||
Dates: |
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Volume: | 529 | ||||||||
Article Number: | 116932 | ||||||||
DOI: | 10.1016/j.jsv.2022.116932 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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