摘要
主动结构主要存在于主动控制以及各种自激颤振场合。对主动结构的动力学特征进行理论分析。从不同的角度对主动结构进行分类，讨论了主动结构的几种具有代表性的范例。进而分析主动结构与非自伴随结构之间的关系。对主动结构的频域特性进行探讨，阐述了主动结构与对应的被动结构的频响函数之间的关系。通过数值算例揭示主动结构的频响函数与被动结构的频响函数之间的差异，进一步展示仿真系统的左右特征向量。通过实验及数据处理，获得一个由自由-自由梁构造的主动结构频响函数，验证主动结构的频域特性。
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.
关键词
主动结构 /
分类 /
频率响应函数 /
左特征向量
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Key words
active structure /
classification /
frequency response functions /
left eigenvectors
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刘海标;宋汉文.
主动结构的动力学特征与频响特性[J]. 振动与冲击, 2014, 33(22): 121-126
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
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