The trace curve of rail corrugation was inputted as track cross-level irregularity,and the vertical displacement,acceleration and other dynamic responses of components under different train speeds were calculated numerically,and the relationship between the dynamic responses and the fractal dimension was investigated.

Physical simulation test of damage character of surrounding rock under different levels of the horizontal stress

Effect of horizontal stress and rock crack density on roof safety thickness of underground area

In order to determine the effects of horizontal stress on floor heave of soft rock roadway in deep mines,the effects of different rock strength,lateral pressure coefficients and depths of notching in floor on deformation of roadway are numerically studied by means of FLAC3D software.

The relation among job satisfaction, stress level and self-efficacy of safety staff in coalmine was investigated by a questionnaire survey conducted to 43 employees in a state-owned coalmine.

Objective:to know the stress level of nurses and their coping mode.

The re- sult of investigation shows local College Students stress level is high;There re differences of the stress source between boys and girls high-grade students stress level is higher than low grade students.

Analysis of the effects of temperature distribution on stress level in a rotating disk;

Calculation and experiment on consolidation coefficient for soft clay considering different stress levels;

Relationship between entrance pore distribution and stress level of natural sedimentary diatomaceous soil;