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    STUDIA ENGINEERING - Issue no. 1 / 2021  
         
  Article:   DIMENSIONLESS WAVE NUMBERS EVOLUTION OF A THREE SPANS SIMPLY SUPPORTED BEAM WHEN THE INTERMEDIATE SUPPORTS ARE MOVING ALONG THE WHOLE BEAM.

Authors:  ZENO-IOSIF PRAISACH, DOREL ARDELJAN, CONSTANTIN-VIOREL PAȘCU.
 
       
         
  Abstract:  
DOI: 10.24193/subbeng.2021.1.2

Published Online: 2021-11-09
pp. 17-24

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FULL PDF: VOL.66, No.1, 2021

Abstract: Continuous beams simply supported with several intermediate supports are very common in engineering achievements everywhere. The paper shows the evolution of the dimensionless wave number in 3D format, respectively of the eigenfrequencies for a continuous beam with three openings when the intermediate supports take any position inside the beam. The frequency equation for calculating the dimensionless wave number is presented and the modal function is given with an example for the case where the eigenfrequency has the maximum value at fist vibration mode.

Keywords: natural frequency, dimensionless wave number, mode shape.
 
         
     
         
         
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