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针对某混凝土重力坝大坝弹性模量反演的主要方法不能描述坝体位移与弹性模量之间的复杂非线性关系、反演时间长等问题,利用有限元分析软件ANSYS获得大坝在不同水位、不同弹性模量下的水平位移,以不同水位工况下的位移相对值与对应的大坝弹性模量作为最小二乘支持向量机的训练样本,建立基于最小二乘支持向量机的大坝弹性模量反演模型;基于大坝位移实测资料,构建位移统计模型并分离出不同水位工况下的大坝实测位移水压分量的相对值,将其作为大坝弹性模量反演模型的输入量,输出量即为大坝弹性模量的反演值。结果表明,采用基于最小二乘支持向量机的反演模型反演坝体、坝基的弹性模量的结果合理可信,为评价大坝运行状态提供了依据。
The main method for the elastic modulus inversion of a concrete gravity dam can not describe the complex nonlinear relationship between the displacement and elastic modulus of the dam and the long inversion time. The finite element analysis software ANSYS Water level and different elastic modulus, the relative displacements under different water level conditions and corresponding dam elastic modulus are taken as the training samples of LS-SVM, and the large-scale support vector machine based on least square support vector machine Dam elastic modulus inversion model. Based on the measured data of dam displacement, the displacement statistical model is constructed and the relative values of measured displacement hydraulic components under different water level conditions are separated and used as the dam elastic modulus inversion model Of the input, the output is the dam elastic modulus of the inverse value. The results show that using the inversion model based on least square support vector machine to back up the dam body, the result of elastic modulus of the dam foundation is reasonable and credible, which provides the basis for evaluating the dam operating status.