Research Of Aluminum Alloy Deck

Due to the advantages of low weight and high strength, aluminum alloy is commonly used in modern military bridge. Starting with topology optimize of 2D continuum and considering the technologic characteristic of manufacture of aluminum alloy, the present work designed the structure of aluminum alloy sandwich panel. Subsequently, The structure of square pontoon was designed.Numerical simulation has been carried out with each kind of aluminum alloy deck panel at 9 different load cases and 2 different support cases respectively. The results indicate that the deck panel with a support at center along axial can meet the need of design load. The comparison of two panels indicates that the erect supporting plate can't improve the stress distributing of deck panel. On the contrary, this structure makes extrusion harder. After structure optimization, the weight of deck panel was decreased about 12% and stresses did not exceed the allowable value, the structure's stability is ensured. Based upon above results, the final structure of deck panel was determined.The present analysis described the static ultimate strength tests for 5 kinds of models(2 types of cross section) and the corresponding numerical calculations. Both the material nonlinearity and geometrical nonlinearity effects were taken into account in the FEM model. The rigid effect of tank pedrail and the panel's initial welded residual deformation were also considered. The results show that the aluminum alloy sandwich deck under lateral pedrail deck load and wheel load would fail in the form of compression buckling. The results indicate that the use of aluminum alloy sandwich panel was a effective way to decrease the structure weight ofpontoon.The model test results matched the numerical results quite well, which proved their validity. The simulation model and the results can be utilized in engineering design.