Modeling Specific Energy for Shield Machine by Non-linear Multiple Regression Method and Mechanical Analysis
The specific energy, defined as the energy consumption to complete the excavation of unit volume of the soil, can well describe the working efficiency of a shield machine. An identification model of the specific energy is established in this paper by introducing the mechanical analysis of the shield excavating process into the nonlinear multiple regression of the on-site data. The mechanical analysis of the shield-soil system helps to decouple the nonlinear multi-parameter problem and the regression process is conducted based on a group of on-site data of subway project in China. Fairly good consistency between the model results and the on-site recorded datum can be achieved. This work provides a useful tool for the analysis of the energy consumption of shield machines.
KeywordsShield Machine Specific energy Mechanical Analysis Nonlinear Multiple Regression
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