【摘要】 利用岩体工程量测的变形或应力,考虑量测结果的随机性,提出了复杂岩体初始地应力场的随机反分析模型.在该模型中,采用具有多项式分布的边界荷载来模拟构造应力场,地应力和边界荷载不必符合特定的分布和假定,可以模拟任意分布的复杂初始地应力场;与有限元相结合,采用改进的能全局优化和智能搜索的加速遗传算法反演出边界荷载多项式系数.最后通过工程实例进行了验证分析,表明该方法的有效和可行性.更多还原

【Abstract】 Considering the stochastic characteristic of the measured deformations or stresses in rock engineering, a stochastic back analysis model to identify the initial stress field in the complex rock mass is presented. The multinomial distributive boundary loads are used to simulate the tectonic stress field in the model; and the initial stress field and boundary loads do not necessarily follow a certain kind of distribution law and assumption. The model can simulate the random distributive initial stress field. Combined with FEM, the improved accelerated genetic algorithm is used to get the multinomial coefficients of boundary loads . The numerical results show that the model is very effective and feasible.更多还原