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Random Vibrations of Strings; Longitudinal and Torsional Vibrations of Straight Rods

  • V. A. Svetlitsky
Part of the Foundations of Engineering Mechanics book series (FOUNDATIONS)

Abstract

It was considered in the preceding chapters devoted to random vibrations of mechanical systems with a finite number of degrees of freedom that elastic elements (for example, rod elements in Fig. 5.8, 5.9, 5.24, 6.7, 6.10) are inertialess, which, of course, is not quite so. This is true only in cases, where concentrated masses are considerably greater than the masses of elastic elements. Unfortunately, the term considerably greater does not relate to a specific numerical estimation and for this reason it is uncertain and sometimes unconvincing. Everything depends on the degree of accuracy imposed on the final numerical results of an analysis. For example, Figure 5.24 shows a concentrated mass m, connected with a spring that was considered massless (inertialess). The real spring, however, has a mass, which at vibrations leads to the occurence of inertia forces that can substantially change any calculation results obtained without regard to them.

Keywords

Aerodynamic Force Angular Acceleration Torsional Vibration Elastic Element Concentrate Force 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • V. A. Svetlitsky
    • 1
  1. 1.The Department of Applied MechanicsBauman Moscow State Technical UniversityMoscowRussia

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