一种混凝土重力坝分区弹模反演新方法

A new method for inversion of sub-regional elastic modulus of concrete gravity dam

建立了一种解决实际工程中测点数少于待反演参数个数的混凝土重力坝分区弹模反演问题的新方法 .这种方法利用已知的补充信息作为反演问题的物理约束条件 ,建立参数反演的多目标优化数学模型 ,解决了反演结果的惟一性问题 ;并且使用改进的模拟退火算法这种全局最优算法来求解大坝的分区弹模 .数值算例表明 ,这种方法对大坝反演问题具有较高的识别精度 ,反演结果可靠 ,可以应用于实际工程 .

A new method, which is used to solve the inverse problem of sub-regional elastic modulus of concrete gravity dam on the condition that the independent measurements are less than the parameters needed to be identified, is put forward. Some known prior information is used as physical constraints for the inverse problem in this method, and then multi-objective optimum numerical model is built up to solve the problem of the uniqueness of the inverse result. In order to get the global optimum solution of parameter inversion, the improved simulated annealing algorithm is used to solve the sub-regional elastic modulus of dam. Numerical examples indicate that the method has the high precision of identification, and the result of inversion is reliable. Therefore, this new method can be applied to the practical engineering.