PSEUDO EXCITATION METHOD OF DIRECT SOLVING GROUND MOTION EQUATION OF MULTI-DIMENSIONAL AND MULTI-SUPPORT EXCITATION
This work is concerned with the input and implementation issues of the pseudo load in the finite element software for a pseudo excitation method.The input of ground motion is achieved more expediently through a "place large numbers" approach.Therefore,the pseudo excitation is swiftly extended from one-dimensional and multi-supports(ODMS) to multi-dimensional and multi-supports(MDMS),and the motion equations are solved directly through absolute displacement.Compared to the traditional MDMS pseudo excitation method,the directly-solving method through the absolute displacement does not decompose the absolute displacement into quasi-static and dynamic relative displacement items,avoids solving the static influence matrix,more efficiently realizes the input of pseudo excitation loading and the analysis of multiple-degree-of-freedom structures in the finite element software,and does not require a special program.The pseudo excitation method is further expanded in theory and engineering applications.