Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Topology Optimization of a HDD Actuator Arm

HDD 구동기 팔의 위상 최적화

  • 장수영 (한국과학기술원 기계공학과) ;
  • 윤성기 (한국과학기술원 기계공학과) ;
  • 김철순 (삼성종합기술원 정밀기계Lab) ;
  • 오동호 (삼성종합기술원 정밀기계Lab)
  • Published : 2000.07.01
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Abstract

A study on the topology optimization of Hard-Disk-Driver(HDD) actuator arm in free vibration is presented. The purpose of this research is to increasse the natural frequency of the first lateral mode of the HDD actuator arm under the constraint of total moment of inertia, so as to facilitate the position control of high speed actuator am. The first lateral mode is an important factor in the position control process. Thus the topology optimization for 2-D model of the HDD actuator arm is considered. A new objective function corresponding to multieigenvalue optimization is suggested to improve the solution of the eigenvalue optimization problem. The material density of the structure is treated as the design variable and the intermediate density is penalized. The effects of different element types and material property functions on the final topology are studied. When the problem is discretized using 8-node element of a uniform density, the smoothly-varying density field is obtained without checker-board patterns incurred. As a result of the study an improved design of the HDD actuator arm is suggested. Dynamic characteristics of the suggested design are compared computationally with those of the old design. With the same amount of the moment of inertia, the natural frequency of the first lateral mode or the suggested design is subsequently increased over the existing one.

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References

  1. Bendsoe, M. P. and Kikuchi, N., 1998, 'Generating Optimal Topologies in Structural Design Using a Homogenization Method,' Comp. Meth. Appl. Mech. Engng., Vol. 71, pp. 197-224 https://doi.org/10.1016/0045-7825(88)90086-2
  2. Suzuki, K. and Kikuchi, N., 1991, 'A Homogenization Method for Shape and Topology Optimization,' Comp. Meth. Appl. Mech. Engng., Vol. 93, pp. 291-318 https://doi.org/10.1016/0045-7825(91)90245-2
  3. Bendsoe, M. P., 1989, 'Optimal Shape Design as a Material Distribution Problem,' Struct. Optimization, Vol. 1, pp. 193-202 https://doi.org/10.1007/BF01650949
  4. Diaz, A.R. and Kikuchi, N., 1992, 'Solutions to shape and Toplolgy Eingenvalue optimization Problems Using a Homogenization Method,' Int. J. Num. Meth. Engng., Vol. 35, pp. 1487-1502 https://doi.org/10.1002/nme.1620350707
  5. Ma, Z. D., Kikuchi, N. and Hagiwara, I., 1993, 'Structural Topology and Shape Optimization for a Frequency Response Problem,' Comp. Mech., Vol. 13, pp. 157-174 https://doi.org/10.1007/BF00370133
  6. Diaz, A. R. and Belding, B., 1993, 'On Optimum Truss Layout by a Homogenization Method,' ASME J. Mech. Des., Vol. 115, pp. 367-373
  7. Bendoe, M. P., Diaz, A. R. and Kikuchi, N., 1993, 'Topology and Generalized Layout Optimization of Elastic Structures,' in Topology Design of Structures (eds. M. P. Bendsoe and C. A. Mota Soares), Kluwer Academic Publishers, Amsterdam, pp. 159-205
  8. Jog, C., 1996, 'Distributed-Parameter Optimization and Topology Design for Non-Linear Thermoelasticity,' Comput. methods. Appl. Mech. Engng., Vol. 132, pp. 117-134 https://doi.org/10.1016/0045-7825(95)00990-6
  9. Jog, C. S. and Haber, R. B., 1996, 'Stability of Finite Element Models for Distributed-Parameter Optimization and Topology Design,' Comput. Methods. Appl. Mech. Engrg., Vol. 130, pp. 203-226 https://doi.org/10.1016/0045-7825(95)00928-0
  10. Korn, R. V. and Strang, G., 1986, 'Optimal Design and Relaxation of Variational Problems,' Commum. pure appl. Math., Vol. 39, pp.139-182 https://doi.org/10.1002/cpa.3160390202
  11. Korn, R. V. and Strang, G., 1986, 'Optimal Design and Relaxation of Variational Problems,' Commum. pure appl. Math., Vol. 39, pp. 357-377 https://doi.org/10.1002/cpa.3160390305
  12. Yang, R. K. and Chang, C.H., 1994, 'Optimal Topology Design Using Linear Programming,' Computers & Structures, Vol. 52, No. 2, pp. 265-275 https://doi.org/10.1016/0045-7949(94)90279-8
  13. Sung-Kie Youn and Sang-Hoon Park, 1997 ,'A Study of The Shape Extraction Process in The Structural Topology Optimization Using Homogenized Material,' Computers & Structures, Vol. 62, No. 3, pp. 527-538 https://doi.org/10.1016/S0045-7949(96)00217-9
  14. Ma, Z. D., Kikuchi, N., Cheng, H. C. and Hagiwara, I., 1995, 'Topology Optimization Technique for Free Vibration Problems,' ASME J. Appl. Mech., Vol. 62, pp. 200-207