parametric modeling


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parametric modeling

Using the computer to design objects by modeling their components with real-world behaviors and attributes. Typically specialized for either mechanical design or building design, a parametric modeler is aware of the characteristics of components and the interactions between them. It maintains consistent relationships between elements as the model is manipulated. For example, in a parametric building modeler, if the pitch of the roof is changed, the walls automatically follow the revised roof line. A parametric mechanical modeler would ensure that two holes are always one inch apart or that one hole is always offset two inches from the edge or that one element is always half the size of another.

Parametric modeler software also provides tabular views of the components (parts list, door schedule, window schedule, etc.) and maintains their association with other views of the model. If a component is edited graphically, the list is updated; if a component is edited on the list, the graphic views are updated. See parametric symbol.


Using Parametric Modeling
The door in this room has been "locked" to four feet from the right wall. When the wall is dragged to the right to make the room larger, the door maintains its relationship with the wall. This screen shot is in Autodesk Revit, the first parametric building modeler to tie together all component views and annotations parametrically for the A/E/C industry. In addition, the program maintains automatic interaction between graphic and schedule views (note door schedule at right). If either one is changed, its counterpart is updated. (Screen shot courtesy of Audodesk, Inc., www.autodesk.com)
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Architecture graduates arrive at firms armed with expertise in parametric tools such as Revit, Grasshopper, and Rhino; they may never have designed without the help of computers, and parametric modeling is familiar to them.
On the other hand, parametric modeling as a design synthesis method allows for the divergence of the design space in order to explore many variants of the same parametric model.
Part 2 covers non-parametric methods used most often in industry, and part 3 covers parametric methods such as spectral analysis by parametric modeling and minimum variance.
Abstract: The scientific paper presents the design and construction of 3D-CAD virtual model through parametric modeling using the CAD-CAM-FEA capabilities of the SolidWorks program.
Beginning with an explanation of the user interface and tools, and progressing though more advanced topics such as assemblies, animations and mass properties, the work underscores key components of the software and points out the benefits of SolidWorks' parametric modeling system.
The proposed parametric modeling strategy allows flexible generation of variations of the original geometry, an essential prerequisite for efficient stent design (see Figure 5).
Predesign cost estimates are usually determined by parametric modeling technique during these early project stages, as detailed cost estimation cannot be performed.
The underlying logic of parametric design can be instrumentalized here as an alternative design method, the one in which the geometric rigour of parametric modeling can be deployed first to integrate manufacturing constraints, assembly logics and material characteristics in the definition of simple components, and then proliferate the components into larger systems and assemblies.
History-based parametric modeling enables a user to control how a 3D model will respond to a given set of changes by designing with parameters (such as height, depth, thickness and other attributes), creating features that contain design intent, and defining relationships between these features.
Based on parametric modeling technology, Autodesk Revit 7 -- included in AutoCAD Revit Series 7 -- incorporates new features that support the creative process and deliver greater levels of productivity, including dramatic advances in conceptual design modeling.
Algor reports that it has added support for the Alibre Design 3-D parametric modeling package from Alibre, Inc.
Cadkey Parametrics is a parametric modeling companion for the popular Cadkey design software.

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