Shield tunneling machine cutterhead abrasion evaluation and prediction method

Abstract

The invention belongs to the technical field of mechanical equipment maintenance, and discloses a shield tunneling machine cutterhead wear evaluation and prediction method, which comprises the following steps: acquiring a data sample set Data in a tunneling state of a shield tunneling machine; preprocessing the data sample set Data to obtain a data sample set Data1; calculating the equivalent abrasion loss Wm of the cutter head when the shield tunneling machine changes the cutter every time; calculating a coefficient vector qL based on Lasso regression; acquiring a data sample set Data2 of the shield tunneling machine in a to-be-tunneled state; calculating the accumulated equivalent abrasion loss WL of the cutter head of the shield tunneling machine after the tunneling mileage is L meters; and obtaining an evaluation and prediction result of shield tunneling machine cutterhead wear. The Lasso regression is adopted to establish the prediction model, the method has a regularization sparse solution screening function, features which are weak in contribution degree to a prediction result in input are removed, and therefore the multicollinearity problem generally existing in a linear regression model is eliminated, feature subsets used by the final model are more accurate, the model prediction accuracy is higher, the generalization ability is higher, and the prediction accuracy is higher. And the overall abrasion loss of the cutterhead can be evaluated and predicted conveniently.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment maintenance, and relates to a method for evaluating and predicting the wear of a shield machine cutter head, in particular to a method for evaluating and predicting the wear of a shield machine cutter head based on Lasso regression, which can be used to predict the wear of a shield machine cutter head Quantitative assessment and forecasting. Background technique [0002] At present, with the continuous acceleration of urbanization in my country, the development and utilization of urban underground space is developing rapidly. The shield tunneling method has become the main construction method of tunnel engineering due to its characteristics of safe construction technology, strong adaptability to soil layers, and little impact on the environment along the line. The shield machine drives the cutter through the cutter head to break the rock, and brings the gravel and sand into the soil ...

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems existing in the prior art, the present invention provides a method for evaluating and predicting wear of shield machine cutterheads, in particular to a method for evaluating and predicting wear of shield machine cutterheads based on Lasso regression, aiming to solve the existing problems in the prior art Problems with narrow scope of application, poor accuracy and low reliability

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