文档介绍：Reliable FE-Modeling with ANSYS
Thomas Nelson, Erke Wang
CADFEM GmbH, Munich, Germany

Abstract
ANSYS is one of the mercial finite element programs in the world and can be applied to a large
number of applications in engineering. Finite element solutions are available for several engineering
disciplines like statics, dynamics, heat flow, fluid flow, ics and also coupled field problems.
It is well known that a finite element solution is always an approximate solution of the considered problem
and one always has to decide whether it is a good or a bad solution. Hence, the question is how a finite
element solution can be validated. In this paper we mention several aspects of modelling to obtain a good
finite element solution for problems in structural mechanics. Although ANSYS gives quite a lot of
warnings to prevent the user from making modelling mistakes, there are still some aspects during the pre-
and postprocessing and also during the solution process we would like to discuss just to point out where
user knowledge might still be necessary to obtain good results.
In our investigations we use both ANSYS products: ANSYS and ANSYS Workbench. Several ways of
modelling a problem of structural mechanics are discussed, taking into account the different available
features of ANSYS and ANSYS Workbench.
Introduction
The finite element method (FEM) is the most popular simulation method to predict the physical behaviour
of systems and structures. Since analytical solutions are in general not available for most daily problems in
engineering sciences numerical methods have been evolved to find a solution for the governing equations
of the individual problem. Although the finite element method was originally developed to find a solution
for problems of structural mechanics it can nowadays be applied to a large number of engineering
disciplines in which the physical description results in a mathematical formulation with some typica