TY - GEN
T1 - Estimation of frequency response function on rotational degrees of freedom of structures
AU - Hosoya, Naoki
AU - Yoshimura, Takuya
N1 - Publisher Copyright:
© 1999 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1999
Y1 - 1999
N2 - In conventional vibration testing, measurement of frequency response function (FRF) has been limited to translational degrees of freedom (DOF). Rotational DOFs have not been treated in experimental analysis. However, the rotational DOF is indispensable in further analysis, such as substructure synthesis, prediction of structural dynamics modification, etc. Hence, measurement of FRFs on rotational DOF is essential for expanding applicability of experimental modal analysis. This paper proposes a new method for FRF estimation on rotational DOF of structures. The following is the estimation procedure: A rigid block is fixed on the measurement point of the structure; the block is excited by conventional impact hammer; the inner force and the response of the connection point including rotational DOFs are estimated; and lastly, the FRF including rotational DOF at the connection point of the structure is obtained. The feasibility of the method is investigated experimentally by applying it to a beam structure.
AB - In conventional vibration testing, measurement of frequency response function (FRF) has been limited to translational degrees of freedom (DOF). Rotational DOFs have not been treated in experimental analysis. However, the rotational DOF is indispensable in further analysis, such as substructure synthesis, prediction of structural dynamics modification, etc. Hence, measurement of FRFs on rotational DOF is essential for expanding applicability of experimental modal analysis. This paper proposes a new method for FRF estimation on rotational DOF of structures. The following is the estimation procedure: A rigid block is fixed on the measurement point of the structure; the block is excited by conventional impact hammer; the inner force and the response of the connection point including rotational DOFs are estimated; and lastly, the FRF including rotational DOF at the connection point of the structure is obtained. The feasibility of the method is investigated experimentally by applying it to a beam structure.
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U2 - 10.1115/DETC99/MOVIC-8406
DO - 10.1115/DETC99/MOVIC-8406
M3 - Conference contribution
AN - SCOPUS:85100996900
T3 - Proceedings of the ASME Design Engineering Technical Conference
SP - 169
EP - 174
BT - International Symposium on Motion and Vibration Control
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1999 Design Engineering Technical Conferences, DETC 1999
Y2 - 12 September 1999 through 16 September 1999
ER -