According to the test of dynamic stress of the 5 000 t heavy haul train and the AAR service standard,this paper compiled the stress spectrum of survey station in train body,load spectrum of center plate,longitudinal load spectrum and roll load spectrum.

Using the Transfer Function and wave spectrum,the cyclic stress spectrum,caused by wave and current force can be determined and the predicted fatigue life formula can be obtained.

The following paper introduces the establishment of finite element mechanical model reflected practical operating status of Haizhu bridge,carries out evaluation on utilization safety and residual life of Haizhu bridge by using traffic load model,stress spectrum simulation and fracture mechanics method,and arrives at a conclusion which has referential significance.

Optimal simulation of vertical monochromator of neutron diffraction residual stress instrument;

After the monitoring data of stress-time were calculated from the monitoring data of strain-time,the rain flow count method was adopted to obtain day stress spectrum.

Calculated structural parameter with general finite element analysis software and drew stress response spectrum of the electric wheel dump car\'s frame according to relation geometry and the law\'s of elasticity and random excitation from the road.

It would be unnecessary and irrational to use an ice force response spectrum method as a substitution of the determinstic ice force function approach.