These problems include: design of double service positioned fixture,design of floating screw driver device,solving scheme of "screw driver end chamfering" phenomena,improvement design of "impact effect of swinging cylinder" and solving scheme for mistaken-action of swinging cylinder.

Using the method, impact effects of an actual prestressed concrete simply supported box girder br.

The numerical simulation on explosion and impact effect involves large deformation, high strain rate, and material damage.

Numerical analysis of the impact response of composite perforator in well fluid environment;

Frequency spectrum analysis of impact response for plasma sprayed coatings;

Finite element analysis on axial impact response by displacement method;

It is difficult to measure dynamically impact stress and impact strain of centrifugal attritor directly by using existing experiment equipment.

The finite element stress analysis was carried out on the wheel by the use of finite element analytical software Ansys,which contains the contrast on the values of impact stresses when different gear tooth was chosen for the driving wheel.