Three-dimensional structural analysis using Interactive Graphics

-Three-dimensional finite element structural analysis computer programs can only be used effectively when the input can be accurately generated and checked, and the output correctly examined. With the use of the Sandia Interactive Graphics System, SIGS, which consists of a cathode ray tube, a mini-computer, a CDC 6600 computer and an interactive graphics computer software system, both input and output can be effectively and efficiently processed. Examining three-dimensional objects is made practical by rotation of the object in real time with hardware and with hidden line removal. A computer program has been written with which the analyst can interactively supply and correct data to generate a three-dimensional mesh. Output processing is accomplished by describing planes which cut the three-dimensional object: then contour plots of outputted variables and deformed mesh plots are produced.