Application of Genetic Algorithm for Identification of Elastic Moduli by Resonant Ultrasound Spectroscopy

摘要

Resonant ultrasound spectroscopy (RUS) is widely used to evaluate the characteristics of small solid specimens of single crystals or anisotropic materials. The elastic moduli of the solid body can be determined by measurement of the natural frequencies exited by a pair of piezo-electronic transducer. In this paper, a numerical technique for the determination of the elastic constants in RUS testing is discussed. An alternative evaluation function for the search algorithm of the elastic moduli is employed, and genetic algorithm is applied to estimate the evaluation function in the search process. Some numerical simulations for anisotropic solid body are conducted to demonstrate the effectiveness of the present method.