Complex motions need validation of their definition prior running the computation to avoid running into simulation issues later when resources have been spent. This is particularly critical when defining the motion of multiple gears. Even for marine applications multiple motions of the rudder and propeller can become a headache to set up flawless.
Until version 2410, previewing motions inside Simcenter STAR-CCM+ was possible only by running a simulation with all physics turned off. While this workaround provided a glimpse of how moving parts would behave, it came with two major drawbacks: it was time consuming, and it lacked flexibility. Now you can easily rewind, fast forward, or refine motions interactively.
Motion Preview
Motion Preview is a new tool introduced in version 2410, that enables you to visualize and validate prescribed motions instantly, before committing to a full simulation. You can step through your setup and ensure moving parts behave exactly as intended. For moving equipment with complex kinematics Motion Preview reduces trial-and-error, and cuts overall turnaround time.
For marine applications this can be as simple as checking the coordinates of the propeller and its rotation direction. Or the combination of a steering propeller pod as shown below where the propeller was not attached to the turning motor.
How it works
You can configure Motion Preview through the Tools > Motions node.
To run a preview, a geometry scene is required. By default, Motion Preview creates a new scene, but you can also use an existing one.
To define what appears in the preview, select boundaries from your region under Motion Preview Parts. For each prescribed motion, Motion Preview automatically creates a new displayer.
Once displayers are created, motion playback is managed through the Motion Preview Time Panel. From here you can:
- Play or pause the animation
- Jump directly to a specific motion time
- Adjust scene update increments using Zoom
Motion Preview currently supports the following motion types:
- Direct rotating motion (for parts-based setups)
- Rotations
- Translations
- Superposing motions
These cover most applications in rotating machinery, translating equipment, and multi-body dynamics.
Note on Marine Applications: Motion Preview is not compatible with DFBI motions. Since DFBI motions are determined only after solving the physics, they cannot be previewed. Even primary superposed motions (like rotation) cannot be displayed alongside DFBI.
A possible workaround is to recreate the motion setup without DFBI for testing purposes, and later run the full simulation with DFBI and superposed motions enabled.
Conclusion
For you working on highly dynamic systems, this is a game-changer. Motion Preview puts setup validation in your hands instantly, helping you design, refine, and validate your simulation setup from the very beginning.
The Author
Florian Vesting, PhD
Contact: support@volupe.com
+46 768 51 23 46
