Technical Paper
An Introduction of a Modal Scaling Technique: An Alternative and Supplement to Quasi-Static G Loading Technique with Application in Structural Analysis
1998-11-16
982810
The modal-scaling technique is just a treatment of normal mode results to find stresses in an object responding in its global modes under given boundary and input environment. It takes the stresses from a normal mode run and scales them according to reaction forces either measured in testing or obtained otherwise at the boundaries. This technique is a better alternative and supplement to the traditional quasi-static g loading technique in two aspects. It finds stresses in actual global response modes, while the quasi-static g loading technique finds stresses in approximated global response modes simulated by applying a uniform g loading throughout the object. Additionally, it can find stresses beyond the three principal global response modes (roll, pitch, and bounce) that the quasi-static g loading technique is typically not capable of.