Some aspects of algorithm performance and modeling in transient thermal analysis of structures
Abstract
The status of an effort to increase the efficiency of calculating transient temperature fields in complex aerospace vehicle structures is described. The advantages and disadvantages of explicit and implicit algorithms are discussed. A promising set of implicit algorithms with variable time steps, known as the GEAR package is described. Four test problems, used for evaluating and comparing various algorithms, were selected and finite element models of the configurations are described. These problems include a space shuttle frame component, an insulated cylinder, a metallic panel for a thermal protection system, and a model of the space shuttle orbiter wing. Results generally indicate a preference for implicit oer explicit algorithms for solution of transient structural heat transfer problems when the governing equations are stiff.
 Publication:

Computational Aspects of Heat Transfer in Structures
 Pub Date:
 1982
 Bibcode:
 1982caht.nasa...91A
 Keywords:

 Algorithms;
 Differential Equations;
 Heat Transfer;
 Problem Solving;
 Spacecraft Structures;
 Structural Analysis;
 Computer Programs;
 Finite Element Method;
 Heat Shielding;
 Nonlinear Equations;
 Space Shuttle Orbiters;
 Transient Heating;
 Wings;
 Fluid Mechanics and Heat Transfer