Study on the Levenberg-Marquardt Neural Network Model for Rock Rheology

Abstract:

Rheological experiments were carried out for sandstone and marble specimens from left bank high slope of Jingping First Stage Hydropower Project by using the rock servo-controlling rheology testing machine. Typical triaxial rheological curves under step loading and temperature curves in the process of rheological experiment were gained. BP neural network is improved by Levenberg-Marquardt algorithm. Improved neural network model for rock rheology is established in accordance with the rheology experimental results of rock specimen. The improved neural network model was used to forecast rock rheological experimental curves, and the result shows that the forecasted rock rheology curves are closely accorded with the experimental result. The improved neural network model takes into account the influence of loading history and temperature difference on the rock rheological deformation, and the forecasted result can reflect better the rheology deformation behavior of rock material.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 4103-4108
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.4103
• Online since: July 2011
• Authors: Yu Zhou Jiang, Rui Hong Wang, Jie Bing Zhu
• Keywords: Levenberg–Marquardt Algorithm, Neural Network (NN), Rheology Model, Rock Mechanic

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