Download ZONAIR User`s Manual

AUTOTIP
2.
The AUTOTIP bulk data card automatically generates two sets of surface grid points. The location of
these surface grid points is the average of the location of those grid points listed in the SET1 bulk data
cards with identification numbers being equal to UPSET1 and LOWSET1. The identification numbers of
those automatically generated surface grid points start from GRIDS.
103
106
102
105
101
104
In the example shown above, six surface grid points are generated by the AUTOTIP bulk data card. If
GRIDS = 101, the identification numbers of those grid points are 101, 102, 103, 104, 105, and 106 where
grid points 101, 102 and 103 are used to connect the upper part of the CQUAD4/CTRIAS elements and
grid points 104, 105 and 106 connect the lower part of the CQUAD4/CTRIA3 elements.
3.
The AUTOTIP bulk data card automatically generated two sets of CQUAD4/CTRIA3 elements, one
connects to those surface grid points along the upper surface at the wing tip and the other one connects the
lower surface. The identification numbers of these automatically generated CQUAD4/CTRIA3 elements
start from PANELS.
304
308
303
302
301
305
307
306
In the example shown above, eight CQUAD4/CTRIA3 elements are automatically generated by the
AUTOTIP bulk data card. If PANELS = 301, the identification numbers of those CQUAD4/CTRIA3
elements are 301~308 where elements 301~304 are connected to the upper grid points and the elements
305~308 to the lower grid points.
Note that the out-normal vector of those CQUAD4/CTRIA3 elements is defined by the right hand rule
from TIPGRID to the grid on the upper surface and then to the grid on the lower surface.
4.
4-36
The AUTOTIP bulk data card automatically generates two sets of CROD elements, one is connected by
those internally generated upper grid points and the other one is connected by the lower grid points. The
identification numbers of those internally generated CROD elements start from RODS.
BULK DATA DESCRIPTION