DOI QR코드

DOI QR Code

고전압 장비 지그의 동특성에 대한 위상, 형상 및 치수 최적화

Topology, Shape and Sizing Optimization of the Jig Supporting High Voltage Pothead

  • 최봉균 (충남대학교 선박해양공학과) ;
  • 이재환 (충남대학교 선박해양공학과) ;
  • 김영중 (한국기계연구원 기계시스템안전연구본부)
  • Choi, Bong-Kyun (Department of Naval Architecture and Ocen Engineering, Chungnam National University) ;
  • Lee, Jae-Hwan (Department of Naval Architecture and Ocen Engineering, Chungnam National University) ;
  • Kim, Young-Joong (Korea Institute of Machinery and Materials Mechanical System Safety Research Division)
  • 투고 : 2013.06.25
  • 심사 : 2013.10.15
  • 발행 : 2013.10.31

초록

본 논문에서는 Pothead를 지지하는데 사용하는 지그의 고유진동수를 일정 범위로 제한하여 Pothead와 공진을 일으키지 않도록 하는 지그의 최적 설계안을 제시한다. 쿤 터커(Kuhn-Thucker) 조건을 적용한 최적기준법(Optimality criteria method)을 사용하여 위상 최적화를 수행하였고, 이 과정에서 유한요소 크기기 최적 형상에 미치는 영향을 검토하였다. 또한 위상 최적화 결과를 바탕으로 실험 계획법(Design of experiments)과 반응 표면법(Response surface method)을 사용하여 형상 및 치수 최적화를 수행하여 비교용 지그에 비해 전체 질량이 30% 감소되는 결과를 얻었다. 마지막으로 최적화된 지그의 내진 해석을 수행한 Pothead의 응답은 Metal Handbook에서 제시된 내진 응답을 만족하고 있다.

In the electric power supplying industry, outdoor sealing end (pothead) is used and sometimes it is necessary to check the seismic qualification analysis or test which is intended to demonstrate that the equipment have adequate integrity to withstand stress of the specified seismic event and still performs their function. And since the pothead is mounted on the supporting jig, the avoidance of resonance between the pothead and jig is required. In order to design jig, three types of optimization are performed to get the minimum weight while satisfying the natural frequency constraint using ANSYS. Optimal array, position and thickness of truss members of the jig are obtained through topology, shape and sizing optimization process, respectively. And seismic analysis of the pothead on the jig for given RRS acceleration computes the displacement and stress of the pothead which shows the safety of the pothead. The obtained natural frequency, mass, and member thickness of the jig are compared with those of the reference jig which was used for seismic experimental test. The numerical results of the jig in the research is more optimized than the jig used in the experimental test.

키워드

참고문헌

  1. ANSYS, Inc. (2009) Theory Reference for the Mechanical APDL and Mechanical Applications Release 12.1.
  2. Bendsoe, M. P., Kikuchi, N. (1998) Generating Optimal Topology in Structural Design Using a Homogenization Method, Computer Methods in Applied Mechanics and Engineering, 71, 1988, pp.197-224.
  3. Kawabe, Y., Yoshida, S. (1996) Structural Optimization by Density Distribution for Maximization of Natural Frequency, Transactions of the ASME-R -Journal of Mechanical Design, 118(1), pp.157-159. https://doi.org/10.1115/1.2826849
  4. Lee, J.H., Huh, Y.J., Joung, T.H., Lee, J.M. (2004) Optimal Design of the Deep-sea Unmanned Vehicle Frame using Design Sensitivity, Journal of the Society of Naval Architects of Korea, 41(3), pp.28-34.
  5. Lee, J.H., Lee, G.H. (1995) Design Sensitivity Analysis and Optimal Design to Control Forced Harmonic Vibration of Structure, Transactions of the Society of Naval Architects of Korea, 32(4), pp.64-72.
  6. Lee, J.H., Kim, Y.J., Kim, J.S. (2007) Vibration Analysis of Network Communication Equipment, Computational Structural Engineering Institute of Korea, 20(4), pp.463-468.
  7. Lee, J.H., Kim, J.H. (2009) Optimization of the Passenger Safety Door(PSD) Part using Response Surface Method, Computational Structural Engineering Institute of Korea, 22(1), pp.73-79.
  8. Ma, Z.-D., Kikuchi, N., Cheng, H.-C., Hagiwara, I. (1995) Topological Design for Vibrating Structures, Computer Methods in Applied Mechanics and Engineering, 121, pp.259-280. https://doi.org/10.1016/0045-7825(94)00714-X
  9. Metals Handbook (1990) Properties and Selection: Irons, Steels, and High-Performance Alloys, ASM International 10th Ed. 1.
  10. Sigmund, O., Petersson, J. (1998) Numerical Instabilities in Topology Optimization: a Survey on Procedures Dealing with Checkerboards, Meshindependencies and Local Minima, Structural Optimization, 16, pp.68-75. https://doi.org/10.1007/BF01214002
  11. Yoon, G.H. (2009) Maximizing the Fundamental Eigenfrequency of Geometrically Nonlinear Structures using the Element Connectivity Based Topology Optimization, Computers and Structures, 88, pp.120-133.
  12. Zhou, M., Shyy, Y.K., Thomas H.L. (2001) Checkerboard and Minimum Member Size Control in Topology Optimization, Structural and Multidisciplinary Optimization, 21, pp.152-158. https://doi.org/10.1007/s001580050179