To solve the problem of service performance evaluation efficiency of multiple types of hanging bolts of typical equipment,a rapid preevaluation method of service performance of hanging bolts is proposed.In this method...To solve the problem of service performance evaluation efficiency of multiple types of hanging bolts of typical equipment,a rapid preevaluation method of service performance of hanging bolts is proposed.In this method,the hanging bolts on five types of equipment are taken as the research objects,including life prediction,evaluation index reconstruction,and service performance evaluation module.The life prediction module analyses the degradation law based on the equivalent cyclic stress calculation method,establishes the stress-life curve,and predicts the fatigue life with the help of Miner’s theory,so as to realize the theoretical fatigue life of the hanging bolt.In the evaluation index reconstruction module,the main influencing factors of the service performance of hanging bolts are studied under the condition of a certain bolt selection,and the construction of three evaluation indexes of average mass,stress ratio and unit load strength is realized.Based on the multi-layer perceptron model and evaluation index,the service performance evaluation module realizes the rapid pre-evaluation of the service performance of hanging bolts.In order to verify the proposed rapid pre-evaluation method,an accelerated fatigue experiment was designed for verification.The experimental results show that the average errors of the pre-assessment results of the service life of the method and the actual results of the accelerated fatigue test are 5.04%,6.20%and 3.52%,respectively,under the conditions of the load amplitudes of 0.075g,0.1g and 0.325g.The experimental method verifies that the rapid pre-assessment method has high prediction accuracy and a certain degree of universality.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.52302446 and U2468227)the Natural Science Foundation of Hunan Province,China(Grant No.2025JJ40040).
文摘To solve the problem of service performance evaluation efficiency of multiple types of hanging bolts of typical equipment,a rapid preevaluation method of service performance of hanging bolts is proposed.In this method,the hanging bolts on five types of equipment are taken as the research objects,including life prediction,evaluation index reconstruction,and service performance evaluation module.The life prediction module analyses the degradation law based on the equivalent cyclic stress calculation method,establishes the stress-life curve,and predicts the fatigue life with the help of Miner’s theory,so as to realize the theoretical fatigue life of the hanging bolt.In the evaluation index reconstruction module,the main influencing factors of the service performance of hanging bolts are studied under the condition of a certain bolt selection,and the construction of three evaluation indexes of average mass,stress ratio and unit load strength is realized.Based on the multi-layer perceptron model and evaluation index,the service performance evaluation module realizes the rapid pre-evaluation of the service performance of hanging bolts.In order to verify the proposed rapid pre-evaluation method,an accelerated fatigue experiment was designed for verification.The experimental results show that the average errors of the pre-assessment results of the service life of the method and the actual results of the accelerated fatigue test are 5.04%,6.20%and 3.52%,respectively,under the conditions of the load amplitudes of 0.075g,0.1g and 0.325g.The experimental method verifies that the rapid pre-assessment method has high prediction accuracy and a certain degree of universality.
