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首页> 外文期刊>Computers & mathematics with applications >A procedure of parameter inversion for a nonlinear constitutive model of soils with shield tunneling
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A procedure of parameter inversion for a nonlinear constitutive model of soils with shield tunneling

机译：盾构隧道非线性本构模型参数反演的程序

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摘要

The identification of the parameters of a nonlinear constitutive model of soil mass is based on an inverse analysis procedure, which consists of minimizing the objective function representing the difference between the experimental data and the calculated data of the mechanical model. A gradient-based optimization algorithm is developed for estimating model parameters of soils in earth pressure balance (EPB) shield tunneling. The parameter values of the nonlinear constitutive model are searched for by using the Levenberg-Marquardt approximation which can provide fast convergence. The parameter identification results illustrate that the proposed parameter inversion procedure has not only higher computing efficiency but also better identification accuracy. The results from the model are compared with simulated observations. The models are found to have good predictive ability and are expected to be very useful for estimating model parameters for soils in EPB shield tunneling.
机译：土体非线性本构模型的参数辨识基于逆分析程序，该程序包括最小化表示力学模型实验数据与计算数据之间差异的目标函数。提出了一种基于梯度的优化算法来估算土压平衡（EPB）盾构隧道中土的模型参数。通过使用Levenberg-Marquardt近似来搜索非线性本构模型的参数值，可以提供快速收敛性。参数辨识结果表明，所提出的参数反演程序不仅具有较高的计算效率，而且具有较高的辨识精度。将模型的结果与模拟观测值进行比较。发现该模型具有良好的预测能力，并且预计对于估算EPB盾构隧道中土壤的模型参数非常有用。

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