Test Study On Property Of The Parallel Composite Isolation Bearings

The H-Bahn system is a new form of transportation that is suspended in the air.In finite element modeling,the computational cost is greatly increased by using the fine model.Based on the simplified calculation,this paper adopts shell element modeling,multi-scale method,submodel method and substructure method to simplify the empty H-Bahn structure,and compares the accuracy and efficiency of different methods.The influence of the moving load on the track of H-Bahn structure is simulated.First of all,the reasonable choice of H-Bahn structure finite element model is set as a starting point.The precise modeling,shell element model,multi-scale model,sub-model model and substructure model of a typical H-Bahn structure is simulated and the results are compared.The results show that shell element modeling can greatly improve computational efficiency,but the error is relatively large.Using substructure method and multi-scale method to simplify the structure of H-Bahn can realize the balance of accuracy and efficiency.Sub-model method in extracting boundaries result can make a big error.Result located away from the border area can reach high precision and Sub-model method can also improve the calculation efficiency.Second,the moving train loads is added in ABAQUS by DLOAD subroutine.Results of the midspan deflection,internal force such as shear force and bending moment,caused by train loads on H-Bahn structure in the moving process are compared.The results show that the deflection of the rail beam is the maximum when the train reaches the span,and the deflection of the rail beam is the maximum deflection when the single side is open to traffic.Loading ways of the train load has a little influence on the position of the train when column axial force reaches the maximum value.When the train is on the middle column,axial force of middle column is the biggest.When the train is on the middle of the beam span,axial force of the side column is the biggest.The axial force of the middle column is the maximum when the two sides of the rail structure are open to traffic.When the train load is close to the mid-span,the beam end shear and bending moment reach the maximum.