The semi-active control landing gear model was simulated trough the Simulation soft MATLAB and the simulation results were in contrast with the results of passive control model.
On the basis of the theory of dynamic mechanics and elastic-plasticity mechanics, the asphalt pavement of semi-rigid subbase on the soft clay ground is analyzed using the axisymmetric FEM.
The results showed that PU elastomers with broad glass transition temperature and damping temperature could be prepared with three soft segments by semi-prepolymer method at appropriate conditions.