SOLIDS BASED ANALYSIS

During the evolution of technology, analysis products have been based on the hardware and CAD products available at the time they were developed. H-element analysis was based on 2D CAD and later 3D wireframe. P-Element and Boundary Element systems used surface models. Today many design engineers are using parametric solid modelers. Procision uses the precise solid geometry for the analysis model and requires absolutely no finite element or geometric element mesh. Complex surfaces, fillets and small details are analyzed with ease. Procision is also able to include both thin-walled and solid sections in the same model.

Procision iterates the analysis automatically until user-defined convergence is achieved for the solution. The systems of equations are computed several times, with each iteration including additional functions.

Procision has unique capabilities in error estimation during the convergence process. Because the functions which approximate the solution exactly fulfill the equilibrium equations in the volume, it is then possible to completely characterize the accuracy of the solution through the error in the boundary conditions. This error drives the convergence. Distribution of the error over the surface of the part can be displayed at any convergence pass. This approach gives the user confidence that the results are accurate, while only using the necessary computer resources.

NO MESH

Procision runs inside CAD environment and requires no finite element or geometric element mesh. It uses the precise CAD geometry for the analysis model. Complex surfaces, fillets and small details can be included. Amazingly, even corrupt geometry can be handled. Procision is also able to include both thin-walled and solid sections in the same model.

Loads and boundary conditions are applied using CAD interface and are directly associated to surfaces, edges, etc. Large changes are easily made to the model because there is no mesh to recreate.

STRESS CONCENTRATORS

Calculating the correct value and locations of small local stress concentrations is one of the most difficult tasks for engineers and analysis software. These areas are very small, and typically unless a very fine mesh is placed at the right location, the solutions will not be accurate. Procision can automatically calculate very accurate stresses due to the local effect of these geometric features. Without a mesh, Procision finally eliminates the guess work and long solution times of traditional methods.

UNIQUE POSTPROCESSING

After a solution is achieved, Procision is able to calculate results for ANY x,y,z point either on the surface or inside the solid model. It is not limited to averaging the calculated values of predetermined elements. This provides the ability to display results with extreme precision. Post processing graphics enable easy, interactive manipulation. Graphs showing stress and displacement results along part edges or any curve between two points can be displayed. Precise shaded models of deformed shapes are displayed for both vibration mode shapes and static deflections.

Animation is available for Structural and Vibration analysis. For time response analysis it is possible to watch the development of the solution in time using the Movie option. This option provides engineers with a complete picture of wave propagation in the structure.

APPLICATIONS

Procision currently performs the following types of analysis:

linear static structural
steady state thermal
natural frequency modal
dynamic time response
dynamic frequency response
dynamic random response