screenshots

obtain scope

Scope is included in the packages containing sumo, which can be found on the sumo page.

visualization for aeroelasticity

Scope is a visualization program to display results generated by the dwfs potential flow solver. Furthermore, it can read many NASTRAN bulk data files as well as modal analysis results and animate modeshapes. Finally, scope animates time-domain flight trajectories of rigid as well as elastic aircraft.

features

Originally, scope was a graphical postprocessing tool for the potential flow solver dwfs . It currently displays meshes and scalar surface data such as potential, source and pressure distributions in the form of three-dimensional color-coded surface plots. Point results can be extracted by simply clicking on a mesh node.

To support the work of the aeroelastician, scope can also display NASTRAN meshes and results. However, it is not meant to be a generic NASTRAN postprocessor; some valid NASTRAN formats are not supported yet, and not all element types can be rendered.

  • Display surface meshes from sumo , as well as topology error descriptions.
  • Load Nastran bulk data files and display elements of the type RBAR, RBE2, CONM2, CMASS2, CELAS2, CBEAM, CBAR, CTRIA3, CTRIAR, CTRIA6, CQUAD4, CQUADR, CQUAD8 using color coding for different element property IDs and material coordinate systems. CHEXA elements are displayed, but volume element property IDs are not shown correctly yet.
  • Animate eigenmode shapes found in NASTRAN result files (.f06) for the solution type SOL 103. Note that the mesh must be echoed into the result file for this (NASTRAN case control command ECHO = UNSORT).
  • Animate complex-valued flutter modeshapes computed by dwfs , either on the structural (finite-element) mesh, or using the aerodynamic surface mesh.

use case

Even without dwfs, scope may be useful: Given a mesh (quickly made using, for example, sumo) or a NASTRAN bulk data file, flight trajectories obtained from your own simulation can be directly loaded from text files adhering to a very simple format. Each line contains the state for a time step according to

t xE yE zE phi theta psi u v w p q r xi1 xi2 xi3 ... 
Here, t is the time (s), and the following 12 are the usual states in flight mechanics expressed in the mesh coordinate system. If you have a modal analysis from NASTRAN, you can optionally provide modal deflections xi1, xi2, xi3...