By Zia Javanbakht, Andreas Öchsner
This e-book deals an in-depth perception into the general-purpose finite aspect software MSC Marc, that's allotted by means of MSC software program company. it's a really expert software for nonlinear difficulties (implicit solver) that's universal in academia and undefined. the first objective of this booklet is to supply a accomplished advent to a distinct function of this software program: the consumer can write user-subroutines within the programming language Fortran, that is the language of all classical finite aspect programs. This subroutine function permits the consumer to exchange definite modules of the middle code and to enforce new positive factors reminiscent of constitutive legislation or new parts. hence, the performance of business codes (‘black box’) can simply be prolonged by way of linking consumer written code to the most center of this system. this option permits to use a advertisement software program package deal with the flexibleness of a ‘semi-open’ code.
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Extra resources for Advanced Finite Element Simulation with MSC Marc: Application of User Subroutines
E. the more experienced the user, the fewer details required. • Usually, a pseudocode starts with start or begin and ends with stop or end. g. two blank spaces. • After the start keyword, the declarations are placed in which declaring the variables, constants, and others, takes place. • Interaction with the user is done by input, read or get and output, write, print or display terms. • Processes are simply written in plain English using calculate or compute terms. 2 Programming - Phases and Tools 19 is possible to write calculate x as square root of y plus x or calculate x=square root of y plus x as the corresponding pseudocode.
EQ . 1 . 0 ) THEN This code tests if the variable aReal is equal to one. However, it is better to be replaced by the following: 1 I F ( ABS ( aReal − 1 . 0 ) . LT . 0 . 2 CASE Construct The IF construct is good enough to test several conditions. However, as the number of conditions increases, the nested IF construct might be rather confusing. In such cases, using a CASE construct is advised. In this construct, the value of an expression, called a case index, is tested against one of the several values or ranges of values, called case values.
2). e. a main program, a module, a subprogram and a block data, provided that some minor modifications are applied: [heading] [specification-part] 38 1 Fortran – Advanced Features [execution-part] [CONTAINS internal-subprogram [internal-subprogram] …] [ending] The required modifications are as the following: • The heading (heading) and the corresponding ending (ending) must be altered based on what type of program unit is being used. In other words, the heading defines the type of program unit.