【摘要】 由于地应力的反演是一个不断逼近最优解的过程,计算量较大,收敛速度较慢。为解决该问题,本文引入遗传算法确定地应力反演中的边界条件,从而提高收敛速度。本文利用改进的反演算法确定河北平原区的边界条件,并在此基础上采用有限元方法计算出该地区的地应力。结果表明,本文提出的算法计算速度快、且其计算结果与地震机制解及活动断裂的分布具有良好的一致性。更多还原

【Abstract】 In order to get the most approximate result in back analysis of earth stress which needs lots of time and has low velocity of convergence,this paper introduces Genetic Algorithms(GA) to find out the boundary conditions in earth stress back analysis to improve the velocity of convergence.The paper takes a case study to calculate the earth stress of Hebei plain using finite element method,on the basis of ascertaining the boundary conditions of this area by the improved back analysis algorithm.The result got by the method introduced in this paper has well congruence with the result of earthquake mechanism and the distribution of.更多还原