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沈曉明，舒贛平
(東南大學(xué)土木工程學(xué)院，南京210096)[摘要] 本文以某實(shí)際工程的不規(guī)則劃分單層網(wǎng)殼結(jié)構(gòu)為研究對象，利用有限元程序ANSYS進(jìn)行線性特征值屈曲分析，預(yù)測結(jié)構(gòu)的理論屈曲強(qiáng)度，考察網(wǎng)殼的屈曲模態(tài)，屈曲路徑，再按照一致缺陷模態(tài)法引入了結(jié)構(gòu)的初始缺陷，在滿跨荷載和半跨活荷載作用下，對結(jié)構(gòu)進(jìn)行非線性有限元全過程跟蹤分析，得到極限荷載，初步了解不規(guī)則劃分單層網(wǎng)殼結(jié)構(gòu)失穩(wěn)的一般規(guī)律。
[關(guān)鍵詞] 不規(guī)則劃分；特征值屈曲分析；一致缺陷模態(tài)法；全過程跟蹤分析Stability Analysis of Single Layer Lattice Shell With Irregular Division
Shen Xiaoming, Shu Ganping
( College of Civil Engineering, Southeast University, Nanjing 210096)Abstract: Based on the actual project-one single layer lattice shell with irregular division, this paper has camed out eigenvalue buckling analysis with ANSYS finite element analysis program, predicted the structural theoretical buckling strength, observed buckling models and paths of single layer lattice shell, and applied initial imperfection on the structure according to consistent mode imperfection method. Finally, under full span load and half-span load, in order to get critical load, all course tracing by nonlinear element has been camed out, so we grasped preliminary the general rules of instability of the single layer lattice shell with irregular division.
Keywords: irregular division; eigenvalue buckling analysis; consistent mode imperfection method; all course tracing analysis
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