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C.S.E. - VALIDATION


Validation in CSE looked to be a quite complex matter, for the program and commands' dimension, on a side, and because connections' checks and computational methods are often questionable, due to the current large use of drastic simplifying hypotheses which do not exactly match the theory.
In particular, CSE, using a general computational model, doesn't "waste" any stress component, as computable by Computational Mechanics ordinary laws. This implies that the forces carried by bolts, welds and components, are in general complex and include components which are often not considered.

During its 15 years of development, as to May 2015, CSE was obviously subjected to thousands and thousands of checks. Moreover, CSE makes large use of external solvers which were themselves subjected to many tests.

Regarding the three external solvers CLEVER, CURAN Full and BUCKLING, these are exactly the same of the software program Sargon, so that the validation work made for them is also valid for these modules of CSE.
At this page you can find many validation sheets of FEM solvers.
Sargon Reader, the visualizer of stresses on FEM models created by CSE and checked by solvers, is nothing else but a limited version of Sargon itself.

It's quite more complex to release single validation sheets about non-FEM checks of CSE, and the reason is that the check of a single connection is composed of many different independent checks (welds and bolts resistance, components resistance to various failure modes). Moreover, no theoretical and clearly univocal results could be used for comparison, like we normally do when dealing with static or modal analyses.

In 2012 we released a quite rich document examining, with a different approach, a series of typical cases and checks executed by CSE (EN 1993 - NTC 2008):  ▶  validation document (about 7 Mb)

This document's purpose is to show that single checks executed by the program are numerically correct.
The document describes in detail a small part of the tests that were effectively done on the software. In any case we must remember that CSE (Connections Study Environment) requires the user to be well aware of different computational needs and to conveniently set not only computational options, but also how to execute specific checks, since CSE is able to contemplate multiple approaches.

In addition to this document other two documents are also available.
▶  The first is a PowerPoint of a lesson held by Mr. Paolo Rugarli to the Milan Order of Engineers, and explaining some of the theoretical background of CSE.
▶  The second one explains how to read the automatically created report to the customers of CSE users, i.e. it explains how to read the documents created by CSE.

Last update: May 28, 2015

 


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