NEWPAN-MSC.Nastran Static Aeroelastics
It is important in the structural design of aerospace and automotive
vehicles to provide accurate estimates for the loads. Usually
aerodynamic loads are significant, and furthermore depend themselves
upon the aerodynamically induced structural deformation. The
relationship between the change in deformation and the change in
loading is usually non-linear, hence getting reliable static
aerodynamic loads for such cases has often proved difficult.
Non-linear analysis of the aero-structural coupled problem provides
a solution. An analysis is needed that feeds the structural deformation
back into the aerodynamic solver and the aerodynamic forces back to the
FEM analysis; this results in an iterative solution procedure. This
analysis provides the deformed aerodynamic mesh for the aerodynamic
department and the aerodynamic forces on the deformed structure for
the design and structural departments.
Flow Solutions in partnership with MSC.Software are able to provide
a coupled NEWPAN-MSC.Nastran™ solution to the
static aeroelastics problem.
The procedure may be summarised as follows:
- Import the NEWPAN model into a MSC.Patran™ database containing the structural model;
- Create the splines between the aerodynamic and structural mesh using MSC.Flightloads™;
- Verify the splines with the results of a structural modal analysis;
- Export the aerodynamic model as a MSC.Nastran™ Aerodynamic Database;
- Export the aeroelastic model containing the splines as a MSC.Nastran™ Aeroelastics Database;
- Define the parameters of the integrated analysis run;
- Run the NEWPAN-MSC.Nastran iterative analysis;
- Post-process the results using MSC.Software and Flow Solutions post-processors.
An example of the aeroelastic analysis of a two element
Formula One racecar front wing assembly using NEWPAN-MSC.Nastran
is presented here(1.5 MB PDF document).
Thanks to the speed of execution of NEWPAN and the
rapid convergence of the iterative procedure, coupled solutions may
be obtained in a matter of minutes.
Coupled NEWPAN-MSC.Nastran analysis of a Formula One racecar front wing.
Animation shows iteration to steady deformed shape in four iterations.
MSC.Nastran,MSC.Patran and MSC.Flightloads are trademarks of MSC.Software Corporation.