ABSTRACT
After the emergence of the concept of infinite element, the domestic and foreign scholars have put forward various kinds of static, dynamic, wave frequency domain or infinite element in the time domain, which can simulate the infinite domain. Infinite element method is developed to solve the effectively. Researchers have proposed different types of infinite element and shape function. But most of the methods are based on the unite shape function, which is multiplied by an attenuation factor, to represent the amplitude of wave decay gradually when the wave extends to infinite element in the relevant direction. Although at present theoretical researchers for the coupling method between finite elementh and infinite element have made some progress, infinite elementh method is a new kind of special method compared with the finite element method. Theory and application of infinite element method are limited. Many questions in practical engineering applications still exist. In this paper, the coupling finite element and infinite element method is used to explore the dynamic problem of the three-dimensional elastic semi infinite soil under moving load.
