In order to produce recommendations for the design of this form of structure it is necessary that a reliable analysis be undertaken so as to produce optimum design. Towards this end the authors embarked upon sensitivity (parametric) analysis using the finite element method. The finite element analysis involved the use of three packages, viz: PAFEC, ABAQUS and ANSYS. Linear elastic analyses were performed.

The finite element systems were not only unable to predict deflections and stresses in the triangularly folded plate structure accurately, but large discrepancies were also observed between the results from the 3 systems. The unsatisfactory results from the analysis with the finite element systems adds support to the schools of thought which have led to the establishment of organizations such as the National Agency for Finite Element Methods and Standards (NAFEMS) in the U.K.

The problems of lack of convergence have led to the use of physical models and consideration of a simpler analytical approach for determining deflections and stresses in the triangularly folded plate structure.

One of the general conclusions drawn is that the availability of powerful and low cost microcomputer based datalogging systems makes physical modelling very attractive for expediting the calibration and development of analytical procedures for modelling structures.

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