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

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Design Parameter Analysis of a Dynamic Absorber for the Control of Machine Body Vibration

기계 진동의 수동적 제어를 위한 동흡진기 설계인자 해석

  • Kim, Giman (Department of Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • Choi, Seongdae (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
  • 김기만 (국립금오공과대학교 기계시스템공학과) ;
  • 최성대 (국립금오공과대학교 기계시스템공학과)
  • Received : 2018.12.17
  • Accepted : 2019.01.07
  • Published : 2019.01.31
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Abstract

The optimal design parameters of a dynamic absorber (DA) in a machine body (that is considered as a rigid body) are discussed in this paper. The bounce and rotation motions of the rigid body have been controlled passively by a DA, which consists of a mass and a spring. The rigid body is subjected to a harmonically excited force and supported by linear springs at both ends. To define the motion of a rigid body with a DA, the equation of motion was expressed in the third-order matrix form. To define the optimal design conditions of a DA, the reduction of dynamic characteristics, represented by the amplitudes of bounce and rotation, and the transmitted powers, were evaluated and discussed. The level of reduction was found to be highly dependent on the location and spring stiffness of the DA.

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References

  1. Pan, J. and Hansen, C. H., "Active control of total vibratory power flow in a beam. I : Physical System Analysis," The Journal of the Acoustical Society of America, Vol. 89, No. 1, pp. 200-209, 1991. https://doi.org/10.1121/1.400502
  2. Nam, M., Hayek, S. I. and Sommerfeldt, S. D., "Active control of structural intensity in connected structures," Proceedings of the Conference Active 95, pp. 209-220, 1995.
  3. Kim, G. M., "Active control of vibrational intensity at a reference point in an infinite elastic plate," Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 11. No. 4, pp. 22-30, 2001.
  4. Kim, G. M. and Choi, S. D., "Active control of dynamic response for a discrete system in an elastic structure," Advanced Materials Research, Vol. 505, pp. 512-516, 2012. https://doi.org/10.4028/www.scientific.net/AMR.505.512
  5. Lee, S. Y. and Kang, J. G., "Static Stiffness Analysis of 2n1 Type Die Casting Debuming Automation System Structure," Proc. of the KSMPE Autumn Conference, pp. 123, 2018.
  6. Yi, C. S., Kang, D. S., Jeong E. I., Kim H. K., and Baek, I. C., "Structure Analysis on the Material Supply Device for Small Scale Machine Tool," Proc. of the KSMPE Autumn Conference, pp. 126, 2018.
  7. Kim, G. M. and Choi, S. D., "Analysis of the Reduction of the Dynamic Response for the CNC 5 Axles Machining Center," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 9, No. 5, pp. 83-89, 2010.
  8. Choi, S. D., Kim, G. M., Kim, J. K., Xu, B., Kim, J. H., and Lee, D. S., "Analysis of structural and vibration for UT-380 machining center," Proc. of the KSMPE Spring Conference, pp. 97-100, 2009.
  9. Lee, C. S., Chae, S. S., Kim, T .S, Lee, S. M., Park, H. K., Jo, H. T. and Lee, J. C., "A study on the Vibration Analysis of Tapping Center," Proc. of the KSMPE Spring Conference, pp. 233-238, 2009.
  10. Jang, S. H., Kwon, B. C., Choi, Y. H., and Park, J. K., "Structural Design Optimization of a Micro Milling Machine for Minimum Weight and Vibrations," Transactions of the Korean Society of Machine Tool Engineers, Vol. 18, No. 1, pp. 103-109, 2009.
  11. Snowdon, J. C., Vibration and Shock in Damped Mechanical Systems, Wiley, New York, pp 316-331, 1968.