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Article

Experimental Study on Impact Force Identification on a Multi-Storey Tower Structure Using Different Transducers

1
School of Mechanical and Mechatronic Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
2
Rahesh Innovation Center, Shiraz 7188711114, Iran
*
Authors to whom correspondence should be addressed.
Received: 2 December 2020 / Revised: 14 January 2021 / Accepted: 25 January 2021 / Published: 29 January 2021
(This article belongs to the Special Issue Inverse Dynamics Problems)
This paper presents the identification of both location and magnitude of impact forces applied on different positions of a multi-storey tower structure using different types of transducers, i.e., an accelerometer, a laser Doppler vibrometer, and a triangulation displacement sensor. Herein, a model-based inverse method is exploited to reconstruct unknown impact forces based on various recorded dynamic signals. Furthermore, the superposition approach is employed to identify the impact location. Therein, it is assumed that several impact forces are applied simultaneously on potential locations of the multi-storey tower structure, while only one impact has non-zero magnitude. The purpose is then to detect the location of that non-zero impact. The influence of using different hammer tip materials for establishing the transfer function is investigated, where it is concluded that the hammer with a harder tip leads to a more accurate transfer function. An accuracy error function is proposed to evaluate the reconstruction precision. Moreover, the effect of sensor type and location on the accuracy of the reconstruction is studied, where it is shown that the proximity between the impact and sensor locations is a dominant factor in impact force reconstruction. In addition, the efficacy of using different transducers is studied for the impact localization, where it is demonstrated that reducing the degree of under-determinacy by using a combination of system responses of the same type can improve the localization accuracy. View Full-Text
Keywords: impact force identification; tower structure; impact localization; force history; inverse algorithm impact force identification; tower structure; impact localization; force history; inverse algorithm
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MDPI and ACS Style

Kalhori, H.; Tashakori, S.; Halkon, B. Experimental Study on Impact Force Identification on a Multi-Storey Tower Structure Using Different Transducers. Vibration 2021, 4, 101-116. https://0-doi-org.brum.beds.ac.uk/10.3390/vibration4010009

AMA Style

Kalhori H, Tashakori S, Halkon B. Experimental Study on Impact Force Identification on a Multi-Storey Tower Structure Using Different Transducers. Vibration. 2021; 4(1):101-116. https://0-doi-org.brum.beds.ac.uk/10.3390/vibration4010009

Chicago/Turabian Style

Kalhori, Hamed, Shabnam Tashakori, and Benjamin Halkon. 2021. "Experimental Study on Impact Force Identification on a Multi-Storey Tower Structure Using Different Transducers" Vibration 4, no. 1: 101-116. https://0-doi-org.brum.beds.ac.uk/10.3390/vibration4010009

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