- 摘 要
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周志勇 趙惠麟 劉承宗
（東南大學建筑工程系 南京 210018）[提要] 層間剪切、層間彎剪模型的剛度矩陣是三對角J acobi矩陣，利用遞歸算法可進行結構解耦。根據模態(tài)反問題理論，可用精確計算或實測的一個模態(tài)（一般為基本模態(tài)）識別結構的層間剛度值。所識別的層間剛度綜合反映了結構的彎曲、剪切及軸向變形的影響，考慮了各桿件及各樓層之間的動態(tài)耦合效應，包括了原結構動靜態(tài)各種因素的影響，從而提高了動力反應的計算精度。通過工程實例給出了該方法的工程應用。
[關鍵詞] 層模型 模態(tài)反問題 剛度識別 工程應用For lots of structures, such as framed structures, they always are simplified to a series multidegree-of-freedom system. A difficult problem in analysis is how to accurately determine the rigidity coefficients and the mass coefficients of the system. In order to determine them, we present a parameter identification method with the calculation or measurement of mode data according to analytical computation of inverse problem in vibration. By means of a recursive algorithm, the physical parameters and inner states of structure can be determined from one or two mode data. The method combines the dynamic coupling efforts and static deformation of the inner states in structure. The simplified system is more accurately coincident with the original structure and the calculation accuracy of dynamical response is heightened by using the method.
Keywords: floor model; rigidity coefficients identification; inverse problem; vibration
