Optimization
- Systematic Issues
- Non-systematic Issues
Systematic Issues
- Problems that will appear consistently across the population of products, independently of tolerance variations or small changes in the structure.
- Identified to be profound Design issues that require change of mounting strategy
- OptiStruct's design-synthesis technology uses the topology optimization approach to generate innovative concept design proposals. OptiStruct generates an optimal design proposal for the connectors layout of the design based on user-defined design space and design targets.
- In SnRD Modal Frequency Response analysis is used as the optimization load case with an objective of minimizing the modal relative displacement across the selected E-Line.
- SnRD Optimization module, automatically converts the time domain excitations to frequency domain for creating the MFREQ loadcase. Amplitude and phase are considered.
- The design variable for Topology optimization is the CBAR element connecting the Master and Slave components.
- Optimization can be done for the response at single frequency or for a band of frequencies.
Non-systematic Issues
- Problems that will appear in a portion of the population of products. They highly depend on tolerances and variations, and are often not detected during physical validation due to a lack of representative tested population
- Typical root cause is a lack of local stiffness
On the Analysis side, the optimization input deck is generated automatically with all required solver cards. The solution type is a Modal Frequency Analysis, where the objective is to minimize Relative Modal displacement at one or multiple locations for a specific frequency, or a frequency range defined by the user. In the case of the 2D free-size optimization, the analyst can define the allowable thickness range for the selected parts.
- Free-size optimization (targeting Non-Systematic issues) in OptiStruct optimizes the thickness of every element in the design space to generate an optimized thickness distribution in the structure, for the given objective under given constraints.
- In SnRD Modal Frequency Response analysis is used as the optimization load case with an objective of minimizing the modal relative displacement across the selected E-Line.
- SnRD Optimization module automatically converts the time domain excitations to frequency domain for creating the Modal Frequency (MFREQ) loadcase. Amplitude and phase are considered.
- The design variable for free-size optimization is the thickness of the shell elements on the surfaces.
- Optimization can be done for the response at single frequency or for a band of frequencies.