Abstract
This paper analyzes the operating characteristics of the crawler crane and summarizes distributed sources in the process of fatigue crack propagation of the boom, makes an introduction of evaluation process of the boom of the remaining life. Three static reliability analysis models are analyzed; the evaluation of reliability indicators do not change over time, and the defect is pointed out that they cannot be satisfied to solve practical engineering problems. This article regards the load and fatigue resistance as a random process and considers the fatigue failure of the randomness in a variety of factors, the concept of dynamic reliability of the weight index is proposed, and models of dynamic reliability of the weight index are built based on the fatigue bearing capacity mode and limit damage degree mode. By computational analysis of the two models and test comparison of the standard welding components, the remaining fatigue life under the dynamic reliability of the weight index model prediction accuracy higher than the static reliability indicators of prediction accuracy. This method provides a new thinking and new methods for the detection and evaluation of the fatigue life of crane booms.
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Acknowledgments
This work was financially supported by the national scientific and technological support plan (2011BAF04B01) and Jiangsu Province scientific and technological innovation and technology transfer special support plan (BY2012089).
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Cai, F., Zhao, F., Wang, X., Gao, S., Chen, L. (2015). Dynamic Reliability of the Weight Index Model Research of Residual Fatigue Life of the Crane Boom. In: Proceedings of China Modern Logistics Engineering. Lecture Notes in Electrical Engineering, vol 286. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44674-4_13
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DOI: https://doi.org/10.1007/978-3-662-44674-4_13
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