Experimental data indicate that striking distance factor k decreases with the increas.

"The striking distance factor" is introduced based on the improved electric-geometry model and by fully considering difference of electric intensity between lightning stroke on the transmis-sion line and the ground.

Using the bridge-vehicle interaction model considering road roughness,the properties of the vehicle-bridge vibration were investigated,including the impact factor and the riding comfort evaluation.

Bridgehead Bump on the bridge vibration affected by the outcome of that bridge structure will lead to increased impact factor,in order to effectively control the impact of this paper in bridge design,ride board design,soft-settlement areas to be strictly controlled to prevent bump on the bridge structure of important measures.

The impact factor of taxiway bridge is evaluated.

Study on impact coefficient of ladle turret when in operation;

Research of bridge impact coefficient on it s structure frequency;

Taking two bridges as example,the influence of bridge basal frequency on impact coefficient of PC continuous rigid frame bridges with long-span was analyzed.

It is good to describe the bridge surface roughness as a zero-mean stationary Gaussian random process and vehicles as one freedom model,applying ANSYS software to build limit dimensional model of continuous rigid bridge,and bring forward a predigested method to analyze the vehicle-bridge vibration of continuous rigid bridge,in order to discuss variation rules of dynamic coefficient.

The time-displacement history of the bridge is obtained,and the effect of automobile speed on the dynamic coefficient is studied.

In this paper,three calculating forms on Q value are given respectively by coefficient of restitution,coefficient of puncture and exoergic coefficient.