A parametric FEA program now lets engineers manipulate shapes and positions of features in meshed models without accessing the original CAD model or CAD software ), lets analysts extensively change FEA geometry for designs studies. For instance, cross members on a truck frame might be thickened or thinned for crash studies, or adjusted fore or aft to find a stiffer location. The software also works when CAD models are poorly parameterized. Developers say it needs no CAD license, nor much expertise to use. Most FEA programs link to a CAD system so analysis software cleanly imports geometry by avoiding IGES transfers. If there's a flaw in the design, engineers can quickly adjust the model in the CAD system, and reimport it to the analysis software. But the new capability avoids the necessity of a CAD program. At a recent exhibition, Jean Daniel Beley, one developer of the software with Ansys, showed how several adjustments could be made to a truck frame that exists only as a 20-year old Nastran FEA mesh. He selected elements in a meshed engine cradle by drawing a box around them and indicated in a menu he wanted to move them 110 mm in a particular direction. "No remeshing is needed because the system modifies existing mesh by slightly reshaping some elements," says Beley. "The system tracks misshapen and poor-aspect-ratio elements." Analysis results can include animations of displacements as the selected elements move from one extreme to another, and plots of element quality. The software works on any type of mesh -- structural, CFD, multiphysics, and magnetic. The software also indicates how much reshaping the mesh can take. "It generally depends on element size," says Beley. "Finely meshed models can be reshaped more than coarsely meshed ones." If an adjustment is too severe, and an element gets
Products & Services
Finite Element Analysis Software
Finite element analysis software (FEA) uses a numerical technique to model and analyze complex structures by solving boundary-value problems. The structure to be analyzed is divided into points (elements) that make a grid called a mesh.
Mesh generators are software systems that generate a mesh in order to simulate a geometric field. They use various algorithms such as the finite element method (FEM).
Engineering Analysis Software
Engineering analysis software is designed to model, analyze, and predict responses and interactions for applications such as materials, structures, chemical and biological processes, electronic system performance, etc.
Computational Fluid Dynamics Software (CFD)
Computational fluid dynamics software (CFD) is used for the calculation of flow parameters in fluids, and for the design and simulation of the behavior of fluidic systems. CFD is also used to simulate fluid mechanics.
Topics of Interest
In this third and final installment of guidelines for getting an initial FEA program contributing to the design department, Ted Fryberger, president and instructor of DeepSoft Inc., Columbia, Md. ( ),...
Getting a department or company's first FEA program up and running takes more than just learning the software. It calls for training users and establishing a process that lets designers get maximum...
Creating a mathematical model from a CAD model requires first defining the geometry, loads, and restraints along with a type of analysis, such as linear static or transient thermal. Doing so brings...
Most CAD systems stumble when they import models built in other software packages. The circular cover was designed in Solid Edge and imported to 3GA.author from PlassoTech for analysis. Its part tree...
Most FEA students quickly learn that finer meshes usually produce more accurate solutions. A precision contour display indicates the effects the finite-element mesh has on accuracy for the...