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针对采用多元线性回归法分析初始地应力场进行工况组合时仅有选取足够大的计算范围方能避免计算与实测的结果偏差过大,利用多元线性回归拟合精度高的优点,在较小区域范围内通过合成初始应力场并施加使模型内部应力保持平衡的边界条件,采用ABAQUS软件进行地应力平衡分析计算。结果表明,该方法基本消除了边界条件对应力场的影响,可获得拟合精度高、直接应用于工程分析的初始应力场,可供借鉴。
For the multiple linear regression analysis of the initial stress field when the combination of operating conditions only select a sufficiently large calculation range can be calculated and measured results to avoid deviation is too large, the use of multiple linear regression fitting the advantages of high precision, smaller Through the synthesis of initial stress field and the application of boundary conditions that keep the internal stress of the model balanced, the ABAQUS software was used to calculate the stress balance in the region. The results show that this method can basically eliminate the influence of boundary conditions on the stress field and obtain the initial stress field with high fitting accuracy and direct application in engineering analysis.