by Sisi Chen
"Noise and vibration are not invented here!". Undesirable structural dynamics behavior is normally experienced on final assemblies, by which time the underlying cause of the problem is difficult to solve intuitively. Solving the problems classically involves the partial breakdown of assemblies and the application of various structural dynamics testing and analysis procedures, modal analysis being just one of them. Preferably, noise and vibration problems should be avoided by designing the product right the first time, by the use of various integrated analysis and testing disciplines, from the component level to the final assembly. Such an approach is referred to, in a broader sense, by themes as concurrent engineering, foward engineering, simultaneous engineering...
This paper looks into the role of modal analysis in a more global approach to engineering for optimal structural dynamics behavior. Modal analysis technology must evolve further in support of a better integration with other techniques for structural dynamics testing and analysis to solve design problems with interrelated vibration, noise and fatigue performance requirements. The likely evolution of structural dynamics testing systems to meet the requirements of more integrated engineering are discussed. Finally, the concept of technology co-development through the European research programs ESPRIT, BRITE, and EUREKA is reviewed.