한국기계가공학회지 (Journal of the Korean Society of Manufacturing Process Engineers)

  • 제21권7호
  • /
  • Pages.71-76
  • /
  • 2022
  • /
  • 1598-6721(pISSN)
  • /
  • 2288-0771(eISSN)
한국기계가공학회 (The Korean Society of Manufacturing Process Engineers)
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금속 블록에 삽입된 감쇠층의 진동저감 성능 평가

Evaluation of the Vibration Reduction Performance of a Cushioning Layer between Metal Blocks

  • 윤성호 (금오공과대학교 기계공학과)
  • Yun, Seong-Ho (Department of Mechanical Engineering, KUMOH NATIONAL INSTITUTE OF TECHNOLOGY)
  • 투고 : 2022.05.28
  • 심사 : 2022.06.15
  • 발행 : 2022.07.31
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초록

This study describes an evaluation of the vibration-level reduction effect of natural rubber inserted between two aluminum blocks, in which the modal parameters are predicted using two different damping systems. A numerical model with two degrees of freedom was established for both the cases. One was an eigenvalue problem analysis using a state space method and general viscous damping, whereas the other was a method using hysteretic damping. The modal parameters obtained from these two approaches were compared with those obtained from the finite element method using a commercial package. As a result, the natural frequencies observed in the complex frequency response curve were consistently less than the average of four percents. The damping ratios also showed good agreement within a reasonable range. However, the hysteretic damping system showed a relatively larger difference for all modal parameters. This suggests that the analysis procedure makes it easier to predict the vibration transmission characteristics of the shape and configuration of any cushioning layer.

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과제정보

이 연구는 금오공과대학교 학술연구비로 지원되었음(과제번호 202001080001)

참고문헌

  1. Lee, H., Yoon, M.-C. and Kim, J.-D., "Forced Vibration Analysis and Response Characteristics of a Vehicle Dull Progress Model," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 19, No. 11, pp. 49-57, 2020.
  2. Alati, N., Failla G., and Santini, A., "Complex Modal Analysis of Rods with Viscous Damping Devices," Journal of Sound and Vibration, Vol. 333, No. 7, pp. 2130-2163, 2014. https://doi.org/10.1016/j.jsv.2013.11.030
  3. Maia, N., "Reflections on the Hysteretic Damping Model," Shock and Vibration, Vol. 16 No. 5, pp. 529-542, 2009. https://doi.org/10.1155/2009/674758
  4. Yun, S.-H., "Sensitivity Analysis of Dynamic Response by Change in Excitation Force and Cross-sectional Shape for Damped Vibration of Cantilever Beam," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 20, No. 8, pp. 11-17, 2021. https://doi.org/10.14775/ksmpe.2021.20.08.0011
  5. Cortes, F. and Elejabarrieta, M. J., "Structural Vibration of Flexural Beams with Thick Unconstrained Layer Damping," International Journal of Solids and Structures, Vol. 45, No. 22/23, pp. 5805-5813, 2008. https://doi.org/10.1016/j.ijsolstr.2008.06.015
  6. Ansys Workbench 2021R1, Ansys Inc., USA, 2022.
  7. Rao, S .S., Mechanical Vibrations, 6th ed, Pearson Education, pp. 226-231, 2019.
  8. Little, J. A. and Mann, B. P., "Optimizing Logarithmic Decrement Damping Estimation through Uncertainty Propagation," Journal of Sound and Vibration, Vol. 457, pp. 368-376, 2019. https://doi.org/10.1016/j.jsv.2019.05.040
  9. Nakamura, N., "Practical Causal Hysteretic Damping," Earthquake Engineering & Structural Dynamics, Vol. 36, No. 5, pp. 597-617, 2007. https://doi.org/10.1002/eqe.644