Abstract
The purpose of this study is to develop the vibration control system of plural modes of large span structures using spatially dispersed arranged TMDs(tuned mass dampers). In this study, in order to determine the design parameters of TMDs, MTMD(Multiple TMD) method is applied. And to determine the arrangements of MTMD, the method using the superposed shape of controlling modes is newly proposed. The following results of the proposed method compared with the method using the usual single TMD of equal mass were found thorough numerical experiments. 1) The proposed method is especially effective for controlling structures overall and the effect is closely connected with the bandwidth of MTMD. 2) The difference between responses using the equivalent mass and the mass of whole structure for setting up design parameters of MTMD is small and the newly proposed average equivalent mass is useful.
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