Stability Analysis On Partial Double-Layer Latticed Intersected Cylindrical Shell

Partical double-layer reticulated shell cylinder is space reticulated shell, it can be formationed by increaseing chords and abdomen on single intersected shell structure in the local to be the main stress system. Or according to certain rules or smoke on double-layer reticulated shell structure parts chord and flank rod. Partical double-layer reticulated shell structure overcome the single-layer reticulated shell stability, rods, material strength not adequately, at the same time, relative to the shortcomings of double-layer reticulated shell structure is reasonable, the number of rod has the advantages of simple beautiful appearance, it has a good application prospect..Currently, big span reticulated shell analysis methods include linear static analysis, namely the eigenvalue analysis and consider including buckling geometrical nonlinearity and material nonlinearity of nonlinear analysis method. The nonlinear method can imitate the stress and deformation of the shell structure exactly, its analysis results and the practical engineering, is relatively close reticulated shell design.The nonlinear reticulated shell is mainly through the analysis of the structure, load curve to study nonlinear full-range displacement. Using the large-scale finite element analysis software ANSYS, the orthogonal cylinder is put local double-layer reticulated shell, for example, to local double-layer reticulated shell cylinder bearing capacity and stability is studied. Considering the grid form, different load, the initial defects effects form, the influence of factors on the results of statistics, analysis and induction, obtained a series of guiding significance for engineering design.