Why use FEA ?
Structures in the resource and heavy industrial sectors are often geometrically complex and cannot be readily simplified to a traditional beam/frame structural analysis approach. Advanced Finite Element Analysis (FEA) techniques facilitate a more accurate representation of plated structures and thick casting / forging components using 2-D and 3-D elements, respectively.
What FEA software does LEC use ?
LEC use MSC.FEA finite element software, which is a combination of MSC.Patran (finite element modeling pre- and post-processing software) and MSC.Nastran (finite element analysis solver). Nastran is a finite element analysis program that was originally developed for NASA, in the late 1960’s, in the United States. LEC personnel have been using MSC.Nastran software since 1992.
What FEA is not
FEA is not a silver bullet for complex structural problems. The old adage of “garbage in garbage out” is very applicable to FEA computer analyses. Proper selection of solution parameters, element types, mesh density, load & boundary constraints are essential in order to produce a reliable finite element analysis model. One also cannot underestimate the importance of the interpretation of the finite element analysis results. This interpretation skill will allow the analyst to make sound engineering decisions based on the analysis results. That is why all LEC’s advanced structural analyses using finite element modeling, analysis and design checks are carried out in-house by highly experienced and dedicated LEC specialist engineers and technologists.
Typical FEA workflow
LEC retain MSC.FEA licenses for the following advanced structural analysis:
| Solution Type | Typical Application on LEC’s Projects |
|---|---|
| Linear static analysis / linear buckling analysis | Independent design review and development of design solution for a variety of structures in the resource and heavy industrial sectors. |
| Natural frequency / modal analyses | Dynamic sensitive structures (e.g., stacks/chimneys), preliminary analysis for structures subjected to vibrating loads (e.g., crushers). |
| Transient dynamic analysis (frequency/time domain) |
Detailed dynamic analysis for structures subjected to vibrating loads |
| Geometric and material non-linear analysis | Structural forensic investigation. |
LEC’s typical finite element analysis workflow is shown in the diagram below:
Click here to explore some of the projects completed by LEC personnel using finite element analysis.