A New Approach to Estimating Soil Parameters Optimizingly
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摘要: 采用改进进化方向的遗传算法并结合比奥特(Biot)固结有限元数值法对一假设路堤的双层地基的一些主要土性参数进行反演,显示误差很小,收敛速度也很快,这说明改进进化方向遗传算法这种新型的优化算法在土性参数优化估计中具有精度高、反演快的优越性,克服了传统优化方法如共轭梯度法、拟牛顿法和单纯形法所具有的搜索速度随反演参数增多呈级数减慢、容易陷入局部极值点和误差传递导致不收敛等缺点,同时也要比简单遗传算法优越。Abstract: It is very important to reasonably estimate soil parameters in study and analysis of soil engineering problems. Back analysis of soil parameters according to in-situ measurement is one sort of new methods for effectively estimating parameters. An approved genetic algorithm combined with FEM of Biot consolidation in back analyzing some dominant soil parameters of the double foundations of a hypothetical road embankment is proposed. The results shows very good.
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Key words:
- genetic algorithm /
- back analysis /
- parameter estimation /
- numerical method
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