Based on the finite element method,the modeling of stable type suspension bridge based on second development of ANSYS was realized.

This research is based on the existing results of research on the suspension bridge,especially on the stable type suspended bridge.

Discussion on methods of aerostatics stability analysis for long-span bridge and their improvement;

For example, the dynamic performance of each part of structure, and the problem of aerostatics stability for Suspension Bridges in wind load.

In this paper,a method for computation of aerostatic stability of long span bridges,the nonlinear finite element method,is put forward.

Finally, the effects of bridge layout, the angle of incidence and cable sag on aerostatic stability of long-span suspension bridge are discussed.

Nowadays in the engineering, aerostatic stability problems for long-span bridge are not still researched enough, but according to the results of the wind tunnel model tests domestic and abroad, the critical wind speed of the aerostatic stability of long-span bridge may be less than that of the aerodynamic stability under strong wind load.

In this paper,the wind resistant stability of the bridge is checked from aspect of the static wind stability,fluttering stability,vortex-excited resonance and stay cable rain excitation through a series of the modern testing methods of the sectional model test,large-scale vortex vibration test,aeroelastic model test and stay cable artificial rain test in wind tunnel.