By Zia Javanbakht, Andreas Öchsner
This ebook deals an in-depth perception into the general-purpose finite point software MSC Marc, that's disbursed by means of MSC software program company. it's a really good application for nonlinear difficulties (implicit solver) that's universal in academia and undefined. the first aim of this publication is to supply a entire creation to a unique function of this software program: the person can write user-subroutines within the programming language Fortran, that is the language of all classical finite aspect applications. This subroutine characteristic permits the person to exchange yes modules of the center code and to enforce new beneficial properties reminiscent of constitutive legislation or new parts. hence, the performance of industrial codes (‘black box’) can simply be prolonged by way of linking person written code to the most middle of this system. this selection permits to exploit a advertisement software program package deal with the flexibleness of a ‘semi-open’ code.
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Additional info for Advanced Finite Element Simulation with MSC Marc: Application of User Subroutines
A subprogram takes control of the execution flow upon being invoked. In other words, execution of the program transfers to the first action statement within the subprogram in which the actual arguments are now known as dummy arguments. This process is called argument association. From now on, accessing the actual arguments is done through the dummy arguments; the latter serves as a link to the former. A CALL statement for invoking a subroutine has the following syntax: CALL subroutine-name [([[keyword=]actual-argument])] In the syntax, an actual argument can be either a variable in the simplest form or an expression which is being passed to the subroutine.
2 Programming - Phases and Tools Programming is arranging instructions for a computer to manage a task. During this process, some errors might be introduced which may be due to a wrong use of a command such as misspelling a keyword, called a syntax error. e. the program executes but the result is not as expected; it is rather hard to debug this kind of error. In order for a program to execute properly, not only must the instructions obey the correct syntax, but also the development of the code must be based on the right logic.
Although these are supported by the language, it is strongly advised to avoid using them because they violate the structured logic of the program. Alternatively, by using a better design it would be possible to avoid incorporating these statements into the construct. g. ). In such a case, the control of the repetitions is done by the EXIT and CYCLE statements. This approach not only violates the structured program logic but also adds unnecessary complications to the program. In addition, it makes the understanding and debugging of the program troublesome.
Advanced Finite Element Simulation with MSC Marc: Application of User Subroutines by Zia Javanbakht, Andreas Öchsner