Fatigue Analysis On Coal Bunker Of Reticulated Shell Structure Caused By Vibration Coal Transport Trestle

Coal pier hanging on the shell structure fatigue problem has attracted much attention, but the relationship of fatigue damage and the coal conveying trestle has not been clearly defined in the specification, it is greatly restricted the popularization and application of this kind of structureform.Use a cicular storage bunker of a power plant in Zhangzhou Houshi as the enginee-ring background, analysis double-layer reticulated shell structure fatigue damage problem by the vibration of the coal conveying trestle, find out the coal storage fatigue failure mechanism, By means of the numerical analysis of finite element analysis software(ANSYS Fe-safe), the continuous stress generated by the pier vibration as the external load, by time history analysis each bar stress time history spectrum structure, the stress time history spectrum by rain flow meter method stress cycle process are obtained. Combination of materials circulation s-n curve, based on accumulated damage theory,analyze the fatigue damage problem of double-layer reticul ated shell structure. Research results show that the stress spectrum can find out the whole structure of fatigue risk area.Fatigue performance has relationship with materials and load factors, such as structure material determines the s-n curve.anslyze the fatigue damage problem of double-layer reticulated shell structure, the results found that the fatigue performance has relationship with the vibration frequency. To pier vertical vibration for external load, and the phase difference is 225 °for fatigue analysis, after cyclic loading, the structure fatigue damage, damage area mainly in node welds.it provides a scientific basis for fatigue safety design of double-layer reticulated shell structure of circular coal bunker.