Small- and medium-sized reservoir dam safety evaluating method based on GRA-BP (grey relational analysis and back propagation) neural network

Abstract

The invention provides a small- and medium-sized reservoir dam safety evaluating method based on GRA-BP (grey relational analysis and back propagation) neural network in order to overcome the defects of existing small- and medium-sized reservoir dam safety evaluating technology and method. The method comprises the steps of screening main factors influencing small- and medium-sized reservoir dam safety based on grey relational analysis method, and constructing a small- and medium-sized reservoir dam safety evaluation index system; generating a network training inspection sample; determining topological structure of the BP neural network; setting main training parameters of the BP neural network, initializing network connection weights and thresholds, and setting network training end conditions, error precision and training frequency; correcting the network by using L-M algorithm accumulative network global errors; entering the training and inspection samples to train and inspect the safety evaluating BP neural network, and finally constructing an intelligent dam safety evaluating model based on BP neural network. The method provides the functions such as comprehensive safety evaluation and hidden peril analysis, and is highly scientific, effective and practical.

Description

technical field [0001] The invention relates to the technical field of reservoir dam safety research, in particular to a safety evaluation method for small and medium-sized reservoir dams based on a GRA-BP neural network, which is widely applicable to the safety analysis and evaluation of various small and medium-sized reservoir dams. Background technique [0002] There are more than 98,000 reservoirs in my country, which is the country with the largest number of reservoirs and dams in the world. 96% of the dams that have been built are small and medium dams, which have played an important role in flood control, irrigation and power generation in and around cities in our country. Most of these small and medium reservoir dams are earth-rock dams, which have been in operation for more than 30 to 40 years. With the passage of time, the age of the dams increases, and various conditions of dam operation (such as structure, foundation, environment, etc.) gradually change. Coupled...

AI Technical Summary

Problems solved by technology

Although some achievements have been made in the safety evaluation of dams, the following problems still exist: (1) the monitoring model and evaluation method for dam safety analysis and evaluation are not mature enough; (2) the current evaluation of concrete gravity dams, There are many studies on the safety evaluation of arch dams, but for small and medium-sized dams such as earth-rock dams, there is a lack of targeted evaluation models and methods due to the characteristics of the project itself, the specific complexity of dam construction materials, and the different operating conditions.

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