Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Free Vibration Characteristics of a String with Time-Varying Length

길이가 변하는 현의 자유진동 특성

  • 이승엽 (서강대학교 공과대학 기계공학과) ;
  • 박상규 (서강대학교 대학원 기계공학과)
  • Published : 1999.10.01
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Abstract

Time-dependent period and energy of free vibration of a string, whose length varies with time at a constant rate, are investigated by a traveling wave method. When the string length is increased, the vibration period increase, but the free vibration energy decrease with time. However, when the string undergoes retraction, the vibration energy increases with time. String tension together with non-zero instantaneous velocity at the moving boundary results in energy variation. Analytical solutions by the traveling wave method are compared with previous results using the perturbation method and Kotera's approach.

Keywords

References

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