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improving modal testing measurements by identification of shaker/stinger /structure interactions

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Year: 2012
COI code: ISAV02_049
Paper Language: English

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Authors improving modal testing measurements by identification of shaker/stinger /structure interactions

  m mohammadali - Centre of excellence in experimental solid mechanics and dynamics School of Mechanical Engineering, Iran University of Science and Technology
H. Ahmadian -


When a shaker (or exciter) connects to a structure under test (SUT), the dynamic characteris-tics of the excitation system (shaker, stinger and transducers) becomes coupled with those of the SUT. These couplings contaminate recorded measurements, especially while exciting light/flexible SUTs. The aim of this work is to consider interactions between the excitation system and the SUT to introduce a new analytical model for prediction and reduction of this systematic error. With the aid of this model, changes in the dynamic stiffness of the SUT are estimated based on the stiffness of the excitation system. The effects of excitation system lo-cation and stiffness are shown in modal testing on a free-free beam. Furthermore, influence of force transducer location is studied in the excitation system setup. The proposed method is successfully used for identification and prediction of excitation system effects on dynamic characteristics of the beam.


Shaker structure interactions; Stinger; Dynamic stiffness matrix; Frequency re-sponse function (FRF

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COI code: ISAV02_049

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mohammadali, m & H. Ahmadian, 2012, improving modal testing measurements by identification of shaker/stinger /structure interactions, 2nd International Conference on Acoustics and Vibration, تهران, دانشگاه صنعتي شريف, the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
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The University/Research Center Information:
Type: state university
Paper No.: 20354
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