Shape Design in Native CAD


The ability to perform shape optimization and modification is an important requirement for designing fluid dynamic devices. After performing a CFD analysis, engineers must determine either intuitively or via an automatic optimization process shape changes that will result in improved performance. This could include minimizing pressure loss, drag, or other performance metrics. This enables early stage design space exploration of native cad dimensions and native cad shapes.

Two of the most challenging aspects of shape morphing are: first how to control the shape from the analysis environment, and second how to save the final design back in the native CAD package. While shape morphing using the mesh or other surrogate representations offers greater upfront flexibility, the design process is disconnected from the native CAD representation and it can be very expensive to reverse engineer the final shape back to CAD.

CAPRI CAE Gateway enables a very simple approach for driving the native CAD shape in a simulation driven design process. The key benefits of using CAPRI CAE Gateway are:

  • No reverse engineering or rework to return the final design back to CAD,
  • Retain 100% of the original details and integrity of the original CAD model,
  • Maintain 100% associativity with native CAD to share design changes with other disciplines in your PLM environment.
 
  • Shape Design Slide 2
    Nose shape optimization of a launch vehicle for hypersonic flow conditions. CAD model parameterization in Pro/ENGINEER.
  • Shape Design Slide 3
    Supersonic business jet solid model parameterization in Pro/ENGINEER
  • Shape Design Slide 4
    Aircraft shape was optimized to smear out the sonic boom overpressire. CFD was performed in a closed loop with CAPRI CAE Gateway and Pro/ENGINEER to drive the shape design. Image courtesy of M. Aftosmis (Ref. AIAA Paper 2011-1249).
  • Shape Design Slide 5
    Starting with a full featured turbine blade, a user can use CAPRI CAE Gateway to suppress mechanical details, perform shape design, and final unsuppress the mechanical details to produce a consistent CAD model without any reverse engineering. CAPRI enables easy coupling with analysis and optimization tools to perform analysis driven shape optimization.