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

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Lifting Lug by the Change of form Using Multivariate Functions: An Optimal Design Study

다변수 함수를 이용한 형상 변화에 따른 리프팅 러그의 최적 설계에 관한 연구

  • Received : 2021.01.21
  • Accepted : 2021.02.01
  • Published : 2021.04.30
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Abstract

In this paper, we proposed an optimal design for determining the shape of a lifting lug freely by applying a multivariate function to the D-type lug, which is commonly used in shipyards. We derived the optimal aspect ratio of the lug through structural analysis and analyzed the safety and behavior of the lug aspect ratio. As a result, two types of final candidates, both lighter than the existing lug weight, were suitable for the ratio. They were found to have the greatest force at an angle of 45 degrees when a load of 100 tons was imposed. When the horizontal and vertical feature ratio of the lug was 1:3, it showed excellent results in terms of safety rates while maintaining weight reduction and functional aspects.

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References

  1. Kim, S. I., "Design for Raising the Rate of Recovering use of Lifting Lug," Journal of the Society of Naval Architects of Korea, Vol. 40, No. 4, pp. 59-65, 2003. https://doi.org/10.3744/SNAK.2003.40.4.059
  2. Ham, J. H., "Parametric Design Considerations for Lifting Lug Structure on Ship Block," Journal of Ocean Engineering and Technology, Vol. 25, No. 2. pp. 101-107, 2011. https://doi.org/10.5574/KSOE.2011.25.2.101
  3. Lee, S. M. Roh, M. I. Kim, K. S. Ham, S. H. Kim, J. S. Ha, S., "A Study on the Lug Arrangement Method Based on the Optimization Technique and the Mechanics in Shipbuilding," Society of Computational Design and Engineering, pp. 154-157, 2016.
  4. Lee, C. S., Lee, J. H., Shim, E. Y., Heo, E. Y., Kim, J. M., "Development of An Automatic Lug Lay-Out System for Shipbuilding," Society of Computational Design and Engineering, pp. 795-797, 2012.
  5. Ham, J. H., Kim, D., "Consideration of the Lifting Lug Structure using the Hybrid Structural Design System," Journal of Ocean Engineering and Technology, Vol. 23, No. 2, pp. 104-109, 2009.
  6. Park, C. S., Jeon, J. S., Yun, J. O., Lee, J. S., "A Study on the Application of Automatic Cutting Machine for Lifting Lug," Collection of Special Lectures and Academic Presentation by the Korean Society, pp. 42-42, 2016.
  7. Lee, J. S., "On the Design of Lifting Lugs Based on the Ultimate Strength," Computational Structural Engineering Institute of Korea, Vol. 29. pp. 29-36, 2016. https://doi.org/10.7734/COSEIK.2016.29.1.29
  8. Lee, J. S., Kim, M. S., "Ultimate Strength Assessment and Design of T type Lifting Lug," Journal of the Society of Naval Architects of Korea, Vol. 52, No. 6, pp. 444-451, 2015. https://doi.org/10.3744/SNAK.2015.52.6.444
  9. Lee, J. S. Kim, M. S. "Strength Assessment of T-type Lifting Lugs Considering Deformation of Blocks," Journal of Ocean Engineering and Technology, Vol. 29, No. 4, pp. 309-316, 2015. https://doi.org/10.5574/KSOE.2015.29.4.309
  10. Lee, J. S. Kim, M. S. "The Structural Strength Assesment of Lifting Lug," Journal of the Society of Naval Architects of Korea, Vol. 51, No. 1, pp. 42-50. 2014. https://doi.org/10.3744/SNAK.2014.51.1.42
  11. Yun, I. W. Ko, J. H. Kim, Y. I "The Lifting Lug for Mold Transport According to Various Load Conditions," Proceedings of the KSMPE Conference-The Korean Society of Manufacturing Process Engineers, pp. 280-280. 2020.
  12. Ham, J. H. Kim, D. J. "Consideration of the Lifting Lug Structure using the Hybrid Structural Design System," Journal of Ocean Engineering and Technology, Vol. 23, pp. 104-109, 2009.
  13. Ham, J. H. "Parametric Design Considerations for Lifting Lug Structure on Ship Block," Journal of Ocean Engineering and Technology, Vol. 25, pp. 101-107. 2011. https://doi.org/10.5574/KSOE.2011.25.2.101
  14. Jin, K. G. "Genetic Algorithms and Their Applications," Kyowoo Publication, pp. 23-25, 2002.