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    方治華¹，  岳鵬飛¹，  賈宏玉^1,2
    （1 內(nèi)蒙古科技大學(xué)建筑與土木工程學(xué)院，包頭014010；2 南京航空航天大學(xué)宇航學(xué)院，南京210016）

[摘要] 應(yīng)用ANSYS建立了空間剛架結(jié)構(gòu)無損傷和有損傷的有限元模型，根據(jù)結(jié)構(gòu)動(dòng)態(tài)特性參數(shù)對(duì)損傷位置和損傷程度的敏感性分析，選取單元模態(tài)應(yīng)變能變化率作為標(biāo)示量應(yīng)用于結(jié)構(gòu)損傷識(shí)別。對(duì)空間剛架單元模態(tài)應(yīng)變能變化率進(jìn)行計(jì)算。結(jié)果表明，一階應(yīng)變能變化率能夠很好地對(duì)單一或多個(gè)損傷的損傷位置進(jìn)行識(shí)別，也能根據(jù)一階應(yīng)變能變化率對(duì)損傷程度進(jìn)行初步判斷，為探索通過應(yīng)變能變化率識(shí)別空間剛架的結(jié)構(gòu)損傷提供了一種可行的方法。
[關(guān)鍵詞] 空間剛架；結(jié)構(gòu)損傷；應(yīng)變能；損傷識(shí)別
中圖分類號(hào)：TU328    文獻(xiàn)標(biāo)識(shí)碼：A    文章編號(hào)：1002-848X(2011) S2-0266-04

Research on damage of space rigid frame based on change rate of strain energy identification method
Fang Zhihua¹, Yue Pengtei¹, Jia Hongyu^1,2
(1 Architecture and Civil Engineering School, UST Inner Mongolia, Baotou 014010, China; 2 College of Aerospace Engineering, NUAA, Nanjing 210016, China)

Abstract: Finite element models of space frame structure with or without damage were established by ANSYS software. Sensitivity analysis of the damage location and damage degree were carried out according to the structure dynamic characteristics parameters. The change rate of element modal strain energy as the labeled amount was selected and applied to structural damage identification. The element modal strain energy change ratio of space frame was calculated. The results show that the change rate of the first-order strain energy change rate not only identify against single or multiple damage location, but also detemune the initial degree of injury.Afeasible method was provided by identifying the space frame structural damage of the strain energy change rate.
Keywords: space rigid frame; structural damage; strain energy; damage identification