Morphing Structural Concepts Evaluation Criteria Using Dimensionless Analysis and Computer Simulation

Abstract

Predicting the behavior of new airplanes or space structures that undergo large geometry changes in flight present an engineering and scientific challenge. NASA’s Morphing Project and the International Space Station program are both facing these challenges. The task at hand is the study of methodologies to assist engineers and scientists in evaluating and analyzing these so called “morphing” structures. In order to establish a methodology several approaches from dimensionless parameter determinations to solid modelling and computer simulation methods have been used. The determination of critical parameters and in which way they can be used to gain an appreciation of the value of a concept is an integral part of this research. Computer models that use finite element models combined with state of the art dynamic system simulation techniques such as Bond Graph Modelling are presented to demonstrate not only the concept but also structural performance under loads. Several factors from weight, structural responses, volume, and mechanical/electrical power are all considered to establish a criterion to compare different designs. Also presented is historical data to compare new designs to existing designs on the basis of weight.