Dynamic Characteristics and Frequency Response Feature of Active Structure

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (22) : 121-126.

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Dynamic Characteristics and Frequency Response Feature of Active Structure

LIU Hai-biao, SONG Han-wen

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Abstract

Active structures can be found in several engineering contexts, including active control or a variety of self-excited chatter. The dynamic characteristics of active structure are analyzed. Active structure is classified from different perspectives and discussed from several typical examples. Thus, active structure and non-self-adjoint structure are distinguished. Besides, frequency response feature of active structures is studied and the relationship between frequency response functions of active structure and its corresponding passive structure are elaborated. Based on a simulation system, the differences between frequency response functions of active and passive structure are revealed and the left and right eigenvectors of active structure are shown. Through experiments and data processing, the frequency response functions of an active structure constructed by a free-free beam are obtained and frequency response characteristics are verified experimentally.

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active structure / classification / frequency response functions / left eigenvectors

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LIU Hai-biao;SONG Han-wen. Dynamic Characteristics and Frequency Response Feature of Active Structure[J]. Journal of Vibration and Shock, 2014, 33(22): 121-126