NX Nastran DMAP Programmer's Guide - Kxcad.net

1343
SDP
Calculates nondimensional stability and control derivatives
AEDBINDX Aeroelastic database index for monitor point data
PRBDOFS Partitioning matrix to partition the "active" URDDI from the "inactive".
Active URRDI are assigned a 1.0 value and are connected to the
SUPORT degrees-of-freedom.
Output Data Block:
STBDER Table of aerostatic stability derivatives for a single subcase.
UXDIFV Derivative interpolation factors matrix at UX = UXREF.
Parameters:
MACH Input-real-default=no default. Mach number.
Q Input-real-default=no default. Dynamic pressure.
AECONFIG Input-character-no default. Aerodynamic configuration.
SYMXY Input-integer-no default. Aerodynamic x-y symmetry flag.
SYMXZ Input-integer-no default. Aerodynamic x-z symmetry flag.
LPRINT Input-logical-default=TRUE. Print flag for stability derivatives.
Remark:
Each stability derivative has four forms based on:
• The aerodynamic model without any consideration of the structural model
• The aerodynamics after they have been transferred to the structure but
before any elastic effects are computed
• The aerodynamics after they have been transferred to the structure and
elastic deformations have been included. It is assumed that the model is
restrained at the support points for this derivative.
• The aerodynamics after they have been transferred to the structure and
elastic deformations have been included. Movement of the supported
degrees of freedom is included in this derivative.