Design Studio 3rd Party Solver Interface (Copyright 2008 GRM Consulting Ltd. Patent Pending) Design Studio Interface Supporting Topology, Sizing, Shape, Topometry & Topography optimisation, a new interface is available for VR&D GENESIS.  Direct coupling support has been provided for all aspects of: LS-DYNA ABAQUS MSC/MARC Further to the above solver codes coupling to ESI/PAMCRASH is under development. The benefits of using GENESIS over more traditional methods (such as DOE) are the greatly reduced number of function calls made to the third party solver due to the internal approximation and sensitivity calculations carried out. Additionally significantly more design variables can be considered often into the many 1000s. The setup and submission of the problem is carried out using Design Studio for GENESIS in a graphical environment, with clear steps to follow. The method currently supports the following optimisation types: Topology Topometry Sizing Shape Topography

Design Studio Plugin

Implicit Non-Linear Topology Example 1 Using the LS-DYNA implicit solver and GENESIS the gear and locking pin designs have been optimised. The coupling is able to support multiple LS-DYNA models and so one model was created for each rotation direction. The topology optimisation considers 42,000 design variables and converged on a solution with 7 LS-DYNA simulations. This example shows how quickly coupled topology is able to optimise problems with large numbers of design variables.

Locking Pin and Teeth Contact

Displacement of Baseline and Optimised LS-DYNA Models

Deformation Modes Isosurface of Topology Result

Implicit Non-Linear Topology Example 2 Again using the implicit solver this example has been optimised to consider torsion about the centre hole and vertical loading at the centre hole. The model is held together entirely by contact, ordinarily this would make it a difficult problem to pose in a linear code. The design problem is to minimise strain energy for the two loading conditions whilst the mass fraction is constrained to 30%. The solution converges in 5 LS-DYNA simulations.

 

Explicit Impact Example By utilising the efficiency of GENESIS' optimisation routines it is possible to consider both the linear loading requirements and multiple LS-DYNA explicit cases. To demonstrate this, a sizing optimisation has been performed to optimise the body panels of a mini-car for both static body torsion and side pole impact. From the baseline result it is clear that the vehicle was not originally designed considering such an impact. The solution the optimiser converges on demonstrates considerably less intrusion in the pole impact and the torsional rigidity has been maintained at the previous value. The optimisation satisfied the design constraints for 59 variables using only 10 LS-DYNA simulations, minimising the required added mass.

 

 

 

 

 

 

 

 

 

 

 

 

 

Pole Impact Comparison

Further Information For further information and case studies appropriate to your industry sector contact GRM Consulting Ltd. Software benchmarks and evaluations are available on request.                                                                                                                                                   Back to Top