The ObjexxSISAME Suite consists of ObjexxSISAME and the supporting tools and documentation.
ObjexxSISAME performs lumped-parameter structural impact model extraction and simulation. Models can be extracted from crash test instrumentation or simulation data and then simulated in a variety of event speeds and configurations. The 3-D modeling capability in SISAME supports a wide range of impact conditions including angled offset and side impact vehicle crash modes.
SISAME provides a workbench for optimal redesign of a structure to best meet a safety performance standard as specified by, for example, desired occupant compartment or occupant motion histories. Constraints on changes to the structure and component costs can be integrated into the redesign process. SISAME can also be used for finite element model tuning to better match test data. This is a direct optimization process rather than an attempt to optimize by trial-and-error simulations or local descent methods. This capability makes SISAME a powerful complement to finite element modeling for designing structures to meet impact performance requirements.
SISAME provides a number of static and dynamic load-path types. Static and dynamic load-path parameters and Mass weights can be extracted for given motion and/or force data with a user-supplied model configuration. Defined and extracted load-paths can be combined in the same SISAME run, as can instrumented and simulated Masses. Instrumented Mass motions are filtered to a user-specified cutoff frequency with a special simultaneous motion filter.
SISAME is driven by a human-readable, self-documenting input file that specifies the run, model, and output information (a graphical interface and model builder is under development). Extensive defaulting and input checking are performed. Real-time visualization is provided by an OpenSceneGraph OpenGL views of the model configuration and simulation. A variety of outputs is available including signal files, POV-Ray™ model images, and a simulation-ready extracted model file. An animation post-processor allows multiple animations to be generated from different viewing positions and with different camera motions and observed points from the output of a SISAME run.
For more information about SISAME modeling see the SISAME Modeling Overview.
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