Practical Calibration Techniques For The Modal Impact Hammer
Keywords
Accelerometer; Drop calibration; Impact calibration; Load cell; Modal impact hammer
Abstract
Modal impact hammer comprised of a force transducer, a hammer body and different impact tips, is widely used in structural dynamic testing. Users might usually overlook the sensitivity of the impact hammer since it has no influence on the estimation of modal frequency, damping, and mode shape in a Multiple Reference Impact Test (MRIT). However, for the reason of accurate measurement and analysis for estimating the modal scaling factor or measuring the inertial mass of the structure, the calibration process has to be performed in advance. For the majority of off-the-shelf impact hammers, the force transducer cannot be detached. Moreover, the sensitivity of the integrated force transducer is not identical with the hammer because the force is transferred from the sensor to the structure via the impact tip. Therefore, the calibration method for common force transducers is not suitable for the impact hammer. In this paper, on the basis of drop calibration, two practical methods using an accelerometer and a load ceil are presented respectively to calibrate the impact hammer and findings are compared with each other. The influence of different impact tips to the sensitivity of the hammer is also discussed.
Publication Date
1-1-2015
Publication Title
Conference Proceedings of the Society for Experimental Mechanics Series
Volume
5
Issue
2015
Number of Pages
23-29
Document Type
Article; Proceedings Paper
Personal Identifier
scopus
DOI Link
https://doi.org/10.1007/978-3-319-15212-7_3
Copyright Status
Unknown
Socpus ID
85008433274 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/85008433274
STARS Citation
Wang, Tong; Celik, Ozan; Necati Catbas, F.; and Zhang, Lingmi, "Practical Calibration Techniques For The Modal Impact Hammer" (2015). Scopus Export 2015-2019. 1894.
https://stars.library.ucf.edu/scopus2015/1894