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《Journal of Earthquake Engineering and Engineering Vibration》 2013-03
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Analysis of fatigue life for air-cooling fan bridges

XU Yazhou,BAI Guoliang(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi'an 710055,China)  
Based on the in-situ tested vibration responses of an air-cooling fan bridge,the dynamic analysis is performed with modulation amplitude disturbing force model of draught fans.Rainflow method is used to count stress cycles and the fatigue load spectrum of air-cooling fan bridges is then programmed combined with investigation results of running frequencies of different operation modes per year.Fatigue damage to the air-cooling fan bridge is calculated in terms of Miner’s cumulative damage rule and design p-S-N curve.After giving the damage threshold corresponding to fatigue failure,the predicted fatigue life of the fan bridge is longer than the designed service life.Furthermore,the fatigue life slightly decreases as effects of mean stress are taken into consideration by Goodman’s,Gerber’s and Soderberg’s models.
【Fund】: 国家自然科学基金项目(51208410)
【CateGory Index】: U441
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【Citations】
Chinese Journal Full-text Database 5 Hits
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