Stochastic Finite Element and Satellite Structure Design - Finite Element Analysis for Satellite Structures - page 235

5.5 Program Sensitivity-Based Analysis for Implicit
Performance Functions for 3D Beam Elements

The MATLAB program that was written for the 2D beam elements was modified
to fit 3D frame structures. The modifications are as follows:

• BMCOL3 Evaluate element K-matrix for 3D beam element.
• MMCOL3 Evaluate element Mass-matrix for 3D beam element.
• Input3R Includes the files that link the program to ANSYS, load input data, real
constants, and material properties. Types of loading are:

- Concentrated load at nodes.
- Thermal load (Element temperature).
- Acceleration loading.

• FORM3 [ 11 ] main body of the program that applies the FORM method. The
program for the 2D Beam element used partial derivatives to calculate