传统的利用边坡位移进行力学参数反分析的方法构造的目标函数较为简单．为了体现滑坡土体的不同性质，文中在传统优化方法的基础上，分析了滑坡体内部土体的位移特点，并将滑坡土体分为滑坡床、滑坡面和滑坡体3 个类别．然后分别利用模糊数学和粒子群算法求得不同位置土体对3 个类别的隶属度以及3 个类别的位移权重，并根据土体的隶属度和3 个类别的权重构造目标函数．新的目标函数能够反映不同位置土体的滑移特征．最后计算了文中方法和传统方法的目标函数对强度参数的敏感度，结果表明利用文中方法的构造的目标函数对强度参数的敏感性较强，新方法的应用效果较好．

For the traditional inversion analysis method of mechanical parameters using the slope soil displacement,the objective function is too simple to represent the characteristics of the soil in the slope. In order to solve this problem,based on the traditional method, the displacement characteristics of the soil in the slope are analyzed,and the soil is divided into three categories,namely,the landslide bed,the landslide surface and the landslide body. Then,the memberships of the soil at different locations to each soil category are obtained by means of fuzzy mathematics,and the weights of each soil category are obtained via the particle swarm optimization. Moreover,a new objective function is constructed according to the memberships and the weights,which well describes the sliding characteristics of the soil at different locations. Finally,the sensitivities of the objective functions of the traditional and the proposed methods are calculated,respectively. The results show that the new objective function is more sensitive to mechanical parameters and is more effective in practice.