Measurement and analysis of the dynamics of mechanical structures
Mark H. Richardson · The Journal of the Acoustical Society of America · 1979
This paper discusses modern methods of testing, modeling, and analyzing the dynamics of mechanical structures. The topics covered are mathematical modeling of structural dynamics, modes of vibration, the normal mode versus the transfer function technique for structural testing, and identifying modal parameters from transfer function measurements. As indicated, much of the discussion concerns the modes of vibration of mechanical structures which turn out to be the link between the testing and analysis methods discussed in this paper. These methods are based upon the use of digital computers, and algorithms such as the finite element method for modeling and analysis, and digital filtering such as the fast Fourier transform for dynamic measurements. Some of the latest techniques for graphically displaying modes of vibration using low cost measurement instrumentation will also be presented.