With the combination of the multi wave seismic exploration and the conventional coal and gas outburst danger prediction tech- nology,the paper analyzed the elastic wave response features of the outburst coal mass.

During the derivation,the momentum sum of elastic responses of the contact-impact system is demonstrated to be zero.

The elastic responses of the vessel are compared when it is loaded by simulated blast load and three kinds of simplified impulsive loads and the influence of loading duration on the response of the vessel is also analyzed.

The responses can be divided into two parts:elastic responses and rigid responses.

Comparison of two numerical methods for prediction of hydroelastic responses of VLFS on 2D mild variable bottom;

The effect of various dry structural model on hydroelastic response of box-type very large floating structures;

Study on hydroelastic response of box-shaped very large floating structure in regular waves;

Accurate and efficient estimation of their hydroelastic responses in waves remains a key problem in design.

Efficient and accurate estimation of mat-like VLFS s hydroelastic responses in waves is very important for the design.

In the exploration of ocean resources and utilization of ocean space,very large floating structures(VLFS) are of significant uses,However,prediction of their hydroelastic responses to waves remains a key problem in design.

In order to study the mechanical energy dissipation, the inelastic response, including the hysteresis loops, cyclic stress, cyclic hysteresis energy and the accumulated plastic strain energy, was measured for the high strength alloy steel 40CrNiMoA in low cycle fatigue test.