Mechanical Analysis And Structural Optimization Of The Aerobridge

Not only the safety quality of boarding bridge, a load-bearing machine, but also the people’s life safety is affected by its mechanical properties. Nowadays, there are so few papers in china related to the mechanical properties of this product. The mechanical properties and optimization design of boarding bridge are researched in this paper.(1) In this paper, researches on the structural stability of the lifting system go on after the mechanical model of whole boarding bridge structure is built. When analyzing the stability and critical load of the lifting system, I consider it a frame structure. Then, this paper analyzes minimum critical load of the other side normal column in two kinds of extreme circumstances, namely when one side column of the lifting system fails.(2) The secondary stresses in the specific aerobridge truss are studied because this problem confuses the aerobridge mechanical Engineers for long time. By comparing hinge model and rigid model, the effect on the internal force of aerobridge truss structure is obtained due to secondary stresses lead by nodes rigidity. Then it analyzes the influence that secondary stresses lead by nodes eccentricity has on truss aerobridge. Finally, it also analyzes the secondary stresses lead by both nodes rigidity and nodes eccentricity. Stability of truss members carrying larger is checked. It concludes nodes rigidity and nodes eccentricity need be considered into the aerobridge structure design, which can guide engineer design in some certain extent.(3)A new model aerobridge truss structure is proposed. It has better mechanical properties compared with the existing structural form. Then, it gives some suggestions on form selection of truss structure. This paper analyzes size optimization of T type passenger boarding bridge through optimization design module in ANSYS. The optimization design model uses the cross section dimensions of rectangular tube as design variable, the maximum equivalent stress as state variable, the total volume as target variable. The final optimization results can make volume and weight of this structure reduce, which proves the effectiveness of this method. However, it makes the maximum equivalent stress reach the material yield strength actually when the optimization result makes weight of the structure reduce. The engineers need comprehensively consider various parameter settings in practice, and the maximum deformation of structure are put into consideration at the same time.The studies of this paper must help for domestic researches on boarding bridge. Its analysis methods and conclusions must help for the structural design of aerobridge.