改进多级模糊可拓方法在大坝变形评价中的应用  

Application of improved multi-stage fuzzy extension method in evaluation of dam deformation

作　　者：苏观南 孔庆梅 梁睿斌 沈寿亮 

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]河海大学水资源高效利用与工程安全国家工程研究中心,江苏南京210098 [3]青海黄河水电公司大坝管理中心,青海西宁810008

出　　处：《人民长江》2014年第17期89-93,共5页Yangtze River

基　　金：国家自然科学基金项目(51279052);水利部公益性行业科研专项经费项目(201201038)

摘　　要：传统模糊可拓模型在大坝工作性态评价中,一般通过主观赋权法来确定物元特征的权重,而忽视了客观因素的影响。将同级的物元特征(即同级评价指标)关联度组成原始数据矩阵,再利用熵权法计算出该级物元特征的权重,而对于最底层的物元特征值则仍采用简单关联函数法确定权重,由此提出了一种改进的多级模糊可拓评价模型。随后选取某混凝土重力拱坝的3个典型坝段的变形性态进行评价,所得结果与实际情况相符,表明改进的多级模糊可拓方法可用于大坝工作性态的评价,且能避免人为确定权系数所造成的主观误差。When the traditional fuzzy extension model is used to appraise the dam behavior, weights of matter-element char-acteristics are usually determined by subjective weighting method, but the influence of objective factors is ignored. Through incor-porating the relation grade of matter-element characteristics with the same level into an original data matrix, calculating the weights of matter-element characteristics with entropy method, and determining the value of matter-element characteristics in the bottom with the simple correlation method, an improved multi -stage fuzzy extension evaluation model is developed. The model is used to evaluate the deformation behavior of three typical dam sections of a concrete gravity arch dam, and the simulated result is consistent with the actual situation. It is indicated that the improved multi-stage fuzzy extension method is helpful and its application can effectively avoid the subjective errors caused by human factors.

关 键 词：模糊可拓模型 大坝变形 熵权法 物元特征权重 

分 类 号：TV698.1[水利工程—水利水电工程]