【摘要】 针对地下巷道弹性位移反分析的Gauss-Newton-Marquit方法提出了改进措施,将随机有限元中常用的直接求偏导数方法引入地下巷道弹性位移反分析问题中,代替了Gauss-Newton-Marquit方法中求偏导数常用的差分法,从而大大提高了算法的效率,也使反分析结果的可靠性和精度有所提高。工程算例表明,改进后的Gauss-Newton- Marquit方法可更高效地解决地下巷道弹性位移反分析问题,是一种值得推广的优化算法,并可望在大型工程中有良好的应用效果。更多还原

【Abstract】 The improved Gauss-Newton-Marquit method is proposed for back analysis of elastic displacement for underground tunnel. The direct solution method of partial derivative is used in stochastic finite element method to complete the back analysis. Compared to the traditional Gauss-Newton-Marquit method using difference method,the efficiency of the improved method is greatly advanced. The case study shows that the improved method is more efficient in solving the back analysis problem of elastic displacement for underground tunnel and is expected to be applied to large engineering practice.更多还原