The results show that,after drilling through a target,the residual axial velocity of the penetrator tends to slow down as the target thickness increases,while the biggest radial velocity of debris augments first and diminishes gradually.

The limit velocity formula adapted for battle damage simulation was chosen, and the method of calculating the terminal velocity was proposed.

Then we can formulate some empirical formulas about ballistics limit and residual velocity,which are based on a large number of computation data.

This paper analyzes the impact damage forecast for the airplane structure from the following four aspects: ballistic limit, residual velocity, residual mass, forecast of damage size in structure penetrated or not penetrated, simultaneously discusses the development tendency of damage forecast and finally points out the main direction and means in the future damage forecast research.

According to the ballistic experimental results and the theoretical analysis,the linear relation between ballistic limit vBL and area density ρad was confirmed;the versatile experiment relation between vr and ρad was found based on that relative parameters in the experiential relation of residual velocity were expressed by the function of ρad.

Horse power selection for passenger locomotive of 200km/h speed level is expouded and verified from such aspects as the residual acceleration and the loco resistance.

This paper discusses the traction power of the schemes for marching power cars which take diesel locomotive for its head car in the specially busy non electrical interval under the given residual acceleration and the highest running speed 200 km/h.

The method on lithology analysis with relative residual interval velocity is introduced.