佳木斯大学学报（自然科学版）
佳木斯大學學報（自然科學版）
가목사대학학보（자연과학판）
JOURNAL OF JIAMUSI UNIVERSITY (NATURAL SCIENCE EDITION)
2015年
2期
183-185
,共3页
单层球面网壳%整体稳定%非线性%弹塑性%缺陷敏感性%极限承载力
單層毬麵網殼%整體穩定%非線性%彈塑性%缺陷敏感性%極限承載力
단층구면망각%정체은정%비선성%탄소성%결함민감성%겁한승재력
single-layer spherical reticulated dome%stability%nonlinear%elastic plasticity%defect sen-sitivity%ultimate capacity
网壳结构的非线性稳定研究一直是国内外学者关注的热点问题，本文利用大型通用有限元软件ANSYS ，以肋环型单层球面网壳为代表，进行了几何非线性整体稳定分析和弹塑性整体稳定分析．考察了网壳初始缺陷的有无、初始缺陷的选取、以及杆件划分的单元数量对其整体稳定的影响，发现杆件单元划分数目对单层球壳整体稳定性系数没有影响，缺陷整体稳定系数比完善结构整体稳定系数低25．6％，二阶模态缺陷整体稳定系数比一阶模态缺陷整体稳定系数低5％左右．
網殼結構的非線性穩定研究一直是國內外學者關註的熱點問題，本文利用大型通用有限元軟件ANSYS ，以肋環型單層毬麵網殼為代錶，進行瞭幾何非線性整體穩定分析和彈塑性整體穩定分析．攷察瞭網殼初始缺陷的有無、初始缺陷的選取、以及桿件劃分的單元數量對其整體穩定的影響，髮現桿件單元劃分數目對單層毬殼整體穩定性繫數沒有影響，缺陷整體穩定繫數比完善結構整體穩定繫數低25．6％，二階模態缺陷整體穩定繫數比一階模態缺陷整體穩定繫數低5％左右．
망각결구적비선성은정연구일직시국내외학자관주적열점문제，본문이용대형통용유한원연건ANSYS ，이륵배형단층구면망각위대표，진행료궤하비선성정체은정분석화탄소성정체은정분석．고찰료망각초시결함적유무、초시결함적선취、이급간건화분적단원수량대기정체은정적영향，발현간건단원화분수목대단층구각정체은정성계수몰유영향，결함정체은정계수비완선결구정체은정계수저25．6％，이계모태결함정체은정계수비일계모태결함정체은정계수저5％좌우．
The nonlinear stability of reticulated dome is always a hot question for scholars at home and a-broad.By using the finite element software , ANSYS, the stability including geometric nonlinearity and elastic plasticity of a latticed dome was analyzed to study the influences of initial imperfections and number of elements of a rod piece.The results are that the number of elements of a rod piece has little influence on stabilization coef -ficient, the stabilization coefficients of a dome with initial imperfections is 25.6% lower than that of a perfect dome , and the dome with second -mode imperfection has a stabilization coefficient 5%lower than that with first-mode imperfection .
