Coupled Set AutoDesign
The Coupled Set AutoDesign is a new optimisation routine that works best for e.g., a user-defined set (catalogue) of steel/aluminium/other profiles --- where a number of dimensions can vary (height, width, thickness, etc.) in a range of discreet values, but also not all dimensions are independent of each other (i.e., sections of larger height are only produced in certain thicker ranges of thickness).
After the user parametrises a cross-section as a geometrical shape, he/she can create a list of the possible sizes that the different dimensions may have. He can then assign this list as a boundary condition during optimisation in order to limit the possible outcomes to existing shapes only. This makes it possible to optimise general cross-sections in the same way as standard rolled sections from the SCIA Engineer Section Library.
- The user can provide a cross-section dimension list for all parameters (H,B,...).
- An automated optimisation procedure (AutoDesign) selects suitable profiles depending on the set of preferred parameters indicated by the user.
- The user can design according to his own specifications.
How does it work?
- The user has to use as a cross section the geometric shapes from the available groups of cross-section types.
- Definition of the parameters via a "Cross-Section List" needs to be specified. The user fills in numerical values for each of the parameters. This "Cross-Section List" provides the dimension list that will be used during the Couple Set AutoDesign.
- The calculation of the model is performed.
A list of defined parameters in tabular form displays upon opening the parametric value Coupled Set Autodesign.
- AutoDesign searches for an optimal design for the structural entity. SCIA Engineer Autodesign automatically runs the analysis and finds the optimal definition of the structure according to the specific design rules that are chosen by the user.
- The structure is generated based on the defined numerical input.
An example of the Couple Set AutoDesign is shown below.
The user defines his own parameters in term of B,H,T as follows for a general cross-section:
B: 120 ; 180 ; 220 ; 280
H: 180 ; 200 ; 220 ; 240
T: 10 ; 10 ; 10 ; 20
During the AutoDesign process the first instance that will be used is B-120; H-180; T-10; and so on for the rest of the process until it finds the cross section that satisfies the checks.
The unit stresses (per fibre) table in the Cross-section Library has been extended with values for unit warping and unit torsion.