Advanced multimedia interfaces for use in engineering and educational software
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Transcript of Advanced multimedia interfaces for use in engineering and educational software
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Advanced multimedia interfaces for use in engineering and educational software
J. Lindemann, O. Dahlblom and G. Sandberg
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Outline
• General discussion of analysis software for civil engineers, designers and archictects
• A tool for “sketching” structures and forces.
• The “Virtual Workbench” for 3D beam analysis
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Analysis software for designers and architects
• Easy to find analysis software for engineers
• Hard to find analysis software for designers or architects– Different requirements– Different uses and application
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Engineering software
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Engineering software
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Analysis software for designers and architects
• Software must be adapted to a different work process
• Analysis must be easy to use
• Fast, adapted to an iterative process.
• Visualisation of results important
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The design process
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The design process
Problem Investigation Solution Evaluation
Redesign
Final solution
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Painting programs
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Painting programs
• Direct manipulation• Easy to use• Often used by designers/architects• Can this be applied to an analysis tool for
designers and architects?
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ForcePAD
• 2D finite element analysis program
• Structure is painted• Standard paint tools,
brush, lines, geometric primitives and fill
• Visualisation of principal stresses and deformation
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Example of use…
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Educational use at The School of Design Sciences
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First ForcePAD assignment
• Illustrate the shear stresses
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Second ForcePAD assignment
• Bicycle design
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Results
• Standard bicycle designs
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Results
• Modified bicycle designs
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Results
• New bicycle design
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Educational use atStructural Mechanics
• Used in the undergraduate course in structural mechanics
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Assignment 1 – Trusses
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Assignment 1 - Results
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Assigment 2 – Bar of different materials
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Assignment 2 - Results
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Assignment 3 – Concrete test sample
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Assignment 3 - Results
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Assignment 4 – Piece of wood
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Assignment 4 - Results
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Assignment 5 - Beams
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Assignment 5 - Results
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Creating a “virtual workshop”
• Architects often use models to evaluate their designs
• Enables them to get a better ”feel” of the designs• How can this ”workshop” be translated into
software?
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New hardware possibilities
• Cheap 3d/2d acceleration– Real-time lighted and shaded models
– Transparency (Blending)
– Fast 2d operations
• Low cost computational resources– Complex analysis possible on most workstations
– Sometimes even in real-time
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What can we learn from games?
• Direct interfaces
• Not bound by existing paradigms
• Visually appealing
• Often easy to use
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User interface examples
Transparency
Heads up display
Direct manipulation
Dynamic
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ObjectiveFrame
• 3D beam analysis
• Direct manipulation interface
• ”Feedback mode” for visualising deflection in real-time.
• Visualisation of section forces and deformation
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Example of use…
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Educational use at The School of Architecture at Chalmers
University of Technology
• The usability of ObjectiveFrame was tested in the course High Structures --- A Creative Investigation
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Stiffening of structures
• The assignment was to apply stiffening methods to high structures
• A one-hour lecture was given to introduce different methods of stiffening high structures
• The students were given two models– A simple structure for studying the effects of
stiffening a floor
– A more complete structure for evaluating different methods of stiffening.
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The models
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The students
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The results
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Conclusions
• It is difficult to create good educational software• Paradigms can be effectively combined to create
new analysis tools• New hardware enables new ideas• ForcePAD and ObjectiveFrame have succesfully
used in the education
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More information
• ForcePAD and ObjectiveFrame can be found athttp://www.byggmek.lth.se under Resources