加速遗传算法在反演计算土层的剪切模量、阻尼比模型参数值中的应用研究

针对成都地区土层特有的沉积环境及物理力学性质的差异性,采用Martin-Davidenkov模型和阻尼比经验公式,使用基于实码、并引入了更新概率(Pu)的加速遗传算法(AGA),编制了相应的C++程序,反演计算出成都地区各类沉积土的动剪切模量比G/Gmax和阻尼比λ与剪应变幅值γ的关系曲线模型的参数值.结果表明,RAG...

Applied Research on Accelerating Genetic Algorithm Inversion Layer in the Shear Modulus,Damping Ratio Values of Model Parameters

In light of unique sedimentary environment of Chengdu region soil and the differences of the physical and mechanical properties,Martin-Davidenkov model and the empirical formula of damping ratio are used,the corresponding C++ program is done through fact-based code and the introduction of the updated probability of accelerating genetic algorithm,by inversion,we can calculate dynamic shear modulus ratio G/Gmax and damping ratio λ and the shear strain amplitude γ of the curve model parameters of the various types of deposits in Chengdu.The results show that:because of its fast convergence and high accuracy,RAGA is a nonlinear optimization method that not only can search the global optimal solution in greater probability,but also can search local details.