Only displacements of grid points whose identification numbers appear on this SET command will be output.The reference point for relative motion is defaulted to the direct enforced motion input point.When direct enforced motion is not specified the point with the largest mass in the model is used.
The reference point may be specified explicitly using the DYNSOLRELGRID model parameter. ![]() The tools allow the user to submit an analysis to NASTRAN, and import the results and show them graphically. The MacNeal-Schwendler Corporation (MSC) was one of the principal and original developers of the publicly available NASTRAN code. NASTRAN source code is integrated in a number of different software packages, which are distributed by a range of companies. The review recommended that a single generic software program should be used instead. In response, an ad hoc committee was formed. The committee determined that no existing software could meet their requirements. They suggested establishing a cooperative project to develop this software and created a specification that outlined the capabilities for the software. The first name used for the program during its development in the 1960s was GPSA, an acronym for General Purpose Structural Analysis. The eventual formal name approved by NASA for the program, NASTRAN, is an acronym formed from NA SA STR ucture AN alysis. In the late 1960s, the MacNeal-Schwendler Corporation (MSC) started to market and support its own version of NASTRAN, called MSCNASTRAN (which eventually became MSC.Nastran). The original software architecture was developed by Joe Mule (NASA) and Gerald Sandler (NASA), and Stephen Burns (University of Rochester). NASTRAN was released to the public in 1971 by NASAs Office of Technology Utilization. The commercial use of NASTRAN has helped to analyze the behavior of elastic structures of any size, shape, or purpose. For example, the automotive industry uses the program to design front suspension systems and steering linkages. It is also used in designing railroad tracks and cars, bridges, power plants, skyscrapers, and aircraft. The program alone was estimated to have returned 701 million in cost savings from 1971 to 1984. NASTRAN was inducted into the U.S. Space Foundations Space Technology Hall of Fame in 1988, one of the first technologies to receive this prestigious honor. Each new version contains enhancements in analysis capability and numerical performance. Today, NASTRAN is widely used throughout the world in the aerospace, automotive and maritime industries. It has been claimed 3 that NASTRAN is the industry standard for basic types of analysis for aerospace structures, e.g. Under the terms of the settlement, MSC divested a clone copy of its current Nastran software. The divestiture was through royalty-free, perpetual, non-exclusive licenses to UGS Corporation. NASTRAN is compatible with a large variety of computers and operating systems ranging from small workstations to the largest supercomputers. A module is a collection of FORTRAN subroutines designed to perform a specific taskprocessing model geometry, assembling matrices, applying constraints, solving matrix problems, calculating output quantities, conversing with the database, printing the solution, and so on. The modules are controlled by an internal language called the Direct Matrix Abstraction Program (DMAP). All input and output to the program is in the form of text files. However, multiple software vendors market pre- and post-processors designed to simplify building a finite element model and analyzing the results. These software tools include functionality to import and simplify CAD geometry, mesh with finite elements, and apply loads and restraints.
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