Among many factors affecting dynamic modulus and damping ratio, dynamic strain was the most important one.

In order to optimize the technology of press and lower the production cost,a two-stage floating elastic pressing structure at the anvil swage of the second punching die was adopted.

The dynamic elastic parameters are important in seismic prospecting.

It gives a precise image in compressional and shear wave velocity and dynamic elastic parameters of two dimensional rock mass, and a synthetical evaluation of grouting.

Four parameters used to estimate the deicer-frost scaling of concrete were investigated in this paper,such as the scaled mass,tensile strength,compressive strength and dynamic modulus of elasticity.

A new idea of aerodynamic configuration for maneuvering warhead design;

A new kind of maneuvering warhead aerodynamic configuration with the use of two retractile control surfaces was proposed,which avoided such severely aerothermodynamic environment in reentry flying like traditional maneuvering warhead configuration.

A new calculation model for the elastic-plastic time-history analysis of plane steel structures was presented by replacing the general bar element with a new one,which had two rotational springs at its ends.

Maneuverable warhead are the complex nonlinear system,which take a great challenge to the attitude control system designers.