TY - GEN
T1 - FRF measurement of rotational DOFs by T-block approach (improvement of accuracy for random noise and application to a car body)
AU - Hosoya, N.
AU - Yoshimura, T.
PY - 2002/12/1
Y1 - 2002/12/1
N2 - The importance of rotational FRF was recognized widely, and many attempts have been made to measure those FRFs experimentally, but the satisfactory results can hardly be seen. The authors have proposed an estimation method of FRF on rotational degrees of freedom (DOFs) by adding a T-block to the structure's measurement point. In this paper the measurement noise is considered, and the noise effective approach is presented, which lead to good estimate of rotational FRF. The proposed method is applied to estimate cross FRFs of a car body. A new T-square-block (T2-block) for measurement of six DOFs (three DOFs in translation and three DOFs in rotation) is designed. Two T2-blocks are attached to the measurement points of the sub frame of a passenger car: the T2-blocks are excited by the impact hammer, respectively; and cross FRFs of the car body are obtained. The validity of the method is investigated by comparing the experimental model and the FE model. The estimated rotational FRFs of car body are used for structure synthesis approach.
AB - The importance of rotational FRF was recognized widely, and many attempts have been made to measure those FRFs experimentally, but the satisfactory results can hardly be seen. The authors have proposed an estimation method of FRF on rotational degrees of freedom (DOFs) by adding a T-block to the structure's measurement point. In this paper the measurement noise is considered, and the noise effective approach is presented, which lead to good estimate of rotational FRF. The proposed method is applied to estimate cross FRFs of a car body. A new T-square-block (T2-block) for measurement of six DOFs (three DOFs in translation and three DOFs in rotation) is designed. Two T2-blocks are attached to the measurement points of the sub frame of a passenger car: the T2-blocks are excited by the impact hammer, respectively; and cross FRFs of the car body are obtained. The validity of the method is investigated by comparing the experimental model and the FE model. The estimated rotational FRFs of car body are used for structure synthesis approach.
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M3 - Conference contribution
AN - SCOPUS:13444257607
SN - 9073802792
SN - 9789073802797
T3 - Proceedings of the 2002 International Conference on Noise and Vibration Engineering, ISMA
SP - 2271
EP - 2279
BT - Proceedings of the 2002 International Conference on Noise and Vibration Engineering, ISMA
A2 - Sas, P.
A2 - Hal, B.
T2 - Proceedings of the 2002 International Conference on Noise and Vibration Engineering, ISMA
Y2 - 16 September 2002 through 18 September 2002
ER -