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（1 廣東工業(yè)大學(xué)建設(shè)學(xué)院 廣州 510006; 2 廣州航海高等?？茖W(xué)校 510725）
【提要】以中部單層、周圍局部雙層的球面網(wǎng)殼為對(duì)象，采用NewtonRaphson增量迭代及弧長法對(duì)結(jié)構(gòu)進(jìn)行了非線性有限元分析，總結(jié)了此類網(wǎng)殼結(jié)構(gòu)的失穩(wěn)規(guī)律，并且得出了結(jié)構(gòu)由單層過渡到雙層時(shí)臨界荷載的變化規(guī)律。研究結(jié)果表明，局部雙層網(wǎng)殼能夠明顯改善單層網(wǎng)殼的穩(wěn)定性能，提高其網(wǎng)殼的屈曲荷載，既具有雙層網(wǎng)殼的穩(wěn)定性，又能節(jié)省鋼材，是一種理想的空間結(jié)構(gòu)形式。
【關(guān)鍵詞】 局部雙層球面網(wǎng)殼 非線性屈曲 弧長法
Nonlinear Analysis of Partial Double Layers Spherical Reticulated Shell/Guo Ｙongchang１，Xie Zhihong２,Li Lijuan１，Liu Feng１(1 Guangdong University of Technology, Guangzhou 510006,China；2 Guangzhou Maritime College,Guangzhou 510725,China)Abstract:By NewtonRaphon increment iterative method and arclength method，the
 nodes of partial double layers spherical reticulated shell subjected to uniform distributed forces are analyzed with nonlinear finite element theory.The behavior of the critical load is obtained from singlelayer reticulated shell to doublelayer reticulated shell.The research results show that the use of partial double layers spherical reticulated shell can improve the stability of single layer one and promote the ultimate buckling load of its nodes.
Keywords:partial double layers spherical reticulated shell; nonlinear buckling; arclength method
*廣東省自然科學(xué)基金資助項(xiàng)目（032489），廣州市科技計(jì)劃項(xiàng)目資助項(xiàng)目（2003Z3D0221）。