【摘要】 地下结构荷载反算是位移反分析中最有实用价值的一部分 ,本文借助奇异值分解研究了荷载反算中解的稳定性问题。研究表明了结构荷载反算中存在解的不稳定性 ,提出了判断解不稳定程度的方法 ,建立了成功的求解方法 ,完善了用逆法进行线性模型荷载反算的方法更多还原

【Abstract】 The back analysis of underground structure loads is very utilitarian in back analysis of measured displacement.By means of SVD(singular value decomposition),the stability of back analysis solution is studied and the instability of the solution is proved to exist in back analysis,so a method to identify the instability of the solution is put forward and a method of back analysis in underground structure loads is estabilished for the instable problem.In this paper,the method of back analysis of loads in the linear model is perfected.更多还原