Structures are test-characterized for many different reasons using methods of varying sophistication and complexity. You may need to quickly pinpoint and correct a vibration problem. This may be done by simply identifying structural resonances and dominant forcing mechanisms or by plotting the structural deformation pattern at a specific frequency. When in-depth understanding of the structural dynamics is required, responses to measured force inputs are characterized using Modal Analysis. These modal models can be used to validate and update Finite Element models or used directly as the basis for design modification studies. Ultimately, the modal test results can be combined with pure numeric simulations in hybrid models. This modern approach enables cost effective and rapid simulation of a new assembly or configuration.
