{"title":"A physical approach for determining the optimum random-vibration screening duration","authors":"Fengbin Sun, D. Kececioglu","doi":"10.1109/RAMS.1996.500660","DOIUrl":null,"url":null,"abstract":"The authors propose a physical approach for the determination of the optimum random-vibration screening duration. This approach is based on a newly-proposed bimodally-distributed P-S-N diagram, for the fatigue strength of nonscreened units, and its corresponding threshold S-N curve for fatigue defect precipitation. Equations, for mean and variance of the cumulative damage and fatigue-defect precipitation time distributions, and for the optimum random-vibration screening duration, under both stationary narrow-band and stationary wide-band random stressing, are derived in terms of the parameters of the structure-inherent bimodally-distributed P-S-N diagram and of the stress response spectrum which corresponds to the applied acceleration power spectral density (PSD) function. A numerical example is given to illustrate the application of the proposed approach.","PeriodicalId":393833,"journal":{"name":"Proceedings of 1996 Annual Reliability and Maintainability Symposium","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1996-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of 1996 Annual Reliability and Maintainability Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RAMS.1996.500660","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
The authors propose a physical approach for the determination of the optimum random-vibration screening duration. This approach is based on a newly-proposed bimodally-distributed P-S-N diagram, for the fatigue strength of nonscreened units, and its corresponding threshold S-N curve for fatigue defect precipitation. Equations, for mean and variance of the cumulative damage and fatigue-defect precipitation time distributions, and for the optimum random-vibration screening duration, under both stationary narrow-band and stationary wide-band random stressing, are derived in terms of the parameters of the structure-inherent bimodally-distributed P-S-N diagram and of the stress response spectrum which corresponds to the applied acceleration power spectral density (PSD) function. A numerical example is given to illustrate the application of the proposed approach.