模态分析和有限元分析相结合识别材料结构刚度

Identification of Structural Rigidities of Composite Material Using Modal Analysis and Finite Element Method

本文论述了利用模态分析和有限元分析相结合来识别复合材料板的刚度系数的方法。该方法取决于（１）正确的有限元模型；（２）可靠的实验模态分析数据和正确的相关准则；（３）快速而又稳妥的估算方法。

The objective of this paper is to investigate a new identification method of full characterization of a set of macroscopically homogenous elastic properties, plate rigidities of anisotropic composite plates. Using Kalman filter which works in an iterative fashion, the plate rigidities of the finite element model were identified by correlating the dynamic characteristics with the experimental modal results. The simulated experiments proved that: based on a good finite element model, reliable experiment modal data, fast and robust estimation algorithm, both of the means and variances of the plate rigidities can be obtained. The identification method is accurate for engineering applications, especially for lightly damped plates.