Analiza statyczna konstrukcji prętowo-płytowych metodą elementów skończonych, z uwzględnieniem skręcania nieswobodnego

The existing finite elements method has been improved for the analysis of thin-walled rod-shield constructions. The rod-shield construction consist of a thin panel framed with rods on all sides. The stiffness matrix of such elements has been determined by taking into account the non-free torsion of the rods. The stress-matrix and external continous loading matrix of an element have been also determined. The program PPLY in FORTRAN 1900 language for calculations of thin-walled constructions has been worked out. The program applies to calculation of rod constructions, rod-shield constructions and panel constructions. The program has been tested on computer Odra 1300. The paper has been illustrated with examples to verify the total procedure.