The Use Of O-O-P For The Computer Aided For Structure Design

The paper investigated O-O-P(object oriented programming ) method ,by which the software of structural calculation was programmed .it was constituted by the modeling module and the structural calculation module.The part of modeling inherited the idea of baton.of PKPM,which is a topping structral software.By graphics data files,it makes absolute data files;and which becomes the inputting files of the next module.the module also provides a modeling stage for the other structural calculation sofrware.lt avoids the troubles of the whole modeling in the PKPM by beams. columns . all types of load and abutment becoming the element.it carries out the graphics conversation mode by the standard of two-degree graphics software;and quickens the speed of the ultimately inpelmenting codes by the powerful technology of MFC in the VC++.During the concrete realization of the finite element method,the needed components for modeling are defined classes;and the data conversations are made ture, by the idea of class,for another classes. The program is simple and clear,and it completely shows the virtue of the O-O-P. For being in needed time, it don't provide the ontic modeling,and only makes an attempt on the area of the graphics conversation mode.The module takes time to complete.By the data files passed from the modeling module and the element-Beam element, the part of the structural calculation makes use of the finte element method to calculate the loads that they are divided into the dead load and the live load.,and combinates the interior force.lt plots the simple figure and the interior force figure of loads.The ultimately limited load is gotten by calculating the interior force of the each span,and the limitedly interior force is the most absolute value.The combinating value of the interior force is gotten according to the canon.It is a challage to the classical programming , avoids the EMS memory waste of the array in the normal datum structure and is the trend of the finte element method programming that the O-O-P is added to the method of finte element.During the concrete realization,the class of array is programmed that is widely used in the method of finte element and gives the usual fuction to the array calculation.For EMS memory , the pointer is used that makes the defination of the array dynamic.the merit of the method is the least memory and the most efficient,and avoidsthe shortcoming that the array is not dynamicly defined.lt makes the program can be much quickly implemented. . .During the calculation of the finite element method, the beam element is extended and three types of truss element is induct into the beam element.lt makes the framework and the consecutive beam uniform.lt avoids the waste of the EMS memory space that the general rigid array is kept by the method of the constringent one-degree storage.The module is only an attempt on which the O-O-P is used in the area of the CAD(computer aided design ) about the structural calculation.The program achieves the anticipated end and it is very practical and of business boom.