SUMMARY
The discussion focuses on utilizing symmetry planes in COMSOL Multiphysics to reduce degrees of freedom (DoFs) for a structural model requiring a fine grid. The user successfully implemented two symmetry planes, creating a quarter model, but encountered issues with eigenfrequency calculations. While the full geometry yielded an eigenfrequency of 3.5 Hz, the quarter model with symmetry constraints produced an erroneous frequency of 1345 Hz, suggesting a misinterpretation of the symmetry boundary conditions by COMSOL. The user seeks clarification on correctly defining the model as a quarter representation.
PREREQUISITES
- Understanding of COMSOL Multiphysics version 5.6 or later
- Knowledge of symmetry boundary conditions in finite element analysis
- Familiarity with structural modeling concepts, including solid and shell subdomains
- Basic principles of eigenfrequency analysis in mechanical systems
NEXT STEPS
- Research how to correctly implement symmetry boundary conditions in COMSOL Multiphysics
- Explore the effects of symmetry planes on eigenfrequency calculations in structural models
- Learn about the differences between global geometry and quarter model representations in finite element analysis
- Investigate best practices for validating eigenfrequency results against experimental data
USEFUL FOR
Structural engineers, finite element analysts, and researchers using COMSOL Multiphysics for modeling and simulation of mechanical systems, particularly those interested in optimizing models with symmetry considerations.