FINITE ELEMENT ANALYSIS DEVICE, FINITE ELEMENT ANALYSIS METHOD, AND COMPUTER PROGRAM

摘要

PPROBLEM TO BE SOLVED: To provide a finite element analysis device, a finite element analysis method, and a computer program which can reduce the operation time while reducing the operation processing load without exponentially increasing the operation time even when an object to be analyzed has a complicated shape. PSOLUTION: For each of nodes belonging to the uppermost hierarchical layer, a residual is calculated according to the variational principle or an integration equation and a change amount of the node displacement against the calculated residual is calculated for each of the nodes. According to the calculated change amount, the node displacement of each hierarchy is updated to obtain the displacement and the stress so as to calculate a residual of each of nodes belonging to the next hierarchy. According to the calculated residual, the displacement and the stress are obtained. If the hierarchy is not the last one, the similar process is performed to update the displacement and the stress. If the hierarchy is the last one, and if the residuals of all the hierarchies calculated are greater than a predetermined value, the process is repeated from the uppermost hierarchy according to the updated displacement, stress, and residual. If the residuals are not greater than the predetermined value, the residuals are outputted as a converged solution. PCOPYRIGHT: (C)2010,JPO&INPIT