Abstract

FRANCO, S.. Determination of Structural Flexibility by Dynamic Methods. R&D j. (Matieland, Online) [online]. 1986, vol.2, pp.11-15. ISSN 2309-8988.

Verification of structural flexibility is often required in mechanical and civil engineering applications. This is especially needed when dynamic forces are involved. When an assembly consists of different sub-structures, a minimal stiffness is required from each part of the assembly to ensure an overall stiffness performance. An example of such an application came about recently where the stiffness of the newly commissioned 300 ton balancing plant at Escom's Central Maintenance Services facility, had to be established. The stiffness of the bed plate and pedestals had to be measured and compared with specified values. Depending on the type of structure, flexibility measurements are usually carried out by using a static force, namely weights, jack, tension rope et cetera, in conjunction with some sort of force and deflection indicators. While the method is very simple, when dealing with large stiff structures this method may be difficult to apply. In these cases dynamic methods could be considered.

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