FRF estimation on rotational DOFs by rigid block attachment approach

Takuya Yoshimura, Naoki Hosoya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Measurement of frequency response function (FRF) has been limited to translational degrees of freedom (DOFs), which restricts the applicability of experimental modal analysis. This paper proposes a new estimation method of FRF on rotational DOFs. In the proposed method a T-shaped rigid block is attached to structure's measurement point; the block is excited by conventional impact hammer; and the rotational FRF as well as translational FRF with respect to the measurement point are estimated after the numerical procedure. It is shown that the FRFs are free from the inertia effect of the T-block. The feasibility of the method is investigated by applying it to a beam structure. The FRFs including the rotational DOFs are estimated. They are used for the prediction of the FRFs of an integrated structure by substructure synthesis approach. The predicted FRFs are compared to FE analysis and also compared to the prediction in which rotational DOFs are excluded.

Original languageEnglish
Title of host publicationProceedings of the 25th International Conference on Noise and Vibration Engineering, ISMA
Pages1043-1049
Number of pages7
Publication statusPublished - 2000 Dec 1
Externally publishedYes
EventProceedings of the 25th International Conference on Noise and Vibration Engineering, ISMA - Leuven, Belgium
Duration: 2000 Sep 132000 Sep 15

Publication series

NameProceedings of the 25th International Conference on Noise and Vibration Engineering, ISMA

Conference

ConferenceProceedings of the 25th International Conference on Noise and Vibration Engineering, ISMA
CountryBelgium
CityLeuven
Period00/9/1300/9/15

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Yoshimura, T., & Hosoya, N. (2000). FRF estimation on rotational DOFs by rigid block attachment approach. In Proceedings of the 25th International Conference on Noise and Vibration Engineering, ISMA (pp. 1043-1049). (Proceedings of the 25th International Conference on Noise and Vibration Engineering, ISMA).