复合材料参数识别问题的计算方法

提出了一个复合材料性能参数识别问题的计算方法。该方法是通过运用有限元反分析理论和系统辨识技术建立起来的，当给出复合材料结构或者试件的位移测量值后，用所提出的迭代计算方法，可以计算出相关的性能参数。给出了加权最小二乘法的迭代计算公式和误差估计公式。详细讨论了迭代计算中的收敛性问题，并针对二种类型的复合材料板的性能参数进行了模拟计算，计算结果表明，所提出的方法对解决复合材料以及结构的性能参数识别问题是行之有效的

STUDY OF SOLUTION TO IDENTIFICATION OF MECHANICAL PARAMETER OF COMPOSITE

An inverse mehtod is proposed for the identification of the mechanical parameter values of composite. This method is established on the basis of finite element method and inverse analysis theory and system identification technique. When the measured values of displacement of the structure or specimens of the composite are given, with the aid of the iterative scheme proposed, mechanical parameter values can be obtained. The weighted least square iteration computational equations and error estimate equations are given. The convergence states expressed by the iterative computations are discussed in detail, and inverse computation is carried out for two types of anisotropic layered composite plates. The results show that the solution to various mechanical parameters of composite and structure is practical and effective.