Development of Slender Doubler Plate Hybrid Design System for Ship Structure Subjected to Longitudinal In-plane Compression

Title & Authors
Development of Slender Doubler Plate Hybrid Design System for Ship Structure Subjected to Longitudinal In-plane Compression
Ham, Juh-Hyeok;

Abstract
In view of the importance of material reduction and rational structural design due to the rapid increase in oil and steel prices, an optimized structural hybrid design system for the doubler plate of a ship's hull structure was developed. A direct design process by a structural designer was added to this developed optimized system to increase the design efficiency and provide a way of directly inserting a designer's decisions into the design system process. As the first step of the doubler design system development, the design formulas used in doubler design system were introduced. Based on the introduction of influence coefficients $\small{K_{t_c}}$ $\small{K_{t_d}}$, $\small{K_{b_d}}$ and $\small{K_{a_d}}$ according to the variations in the doubler length, breadth, doubler thickness, and average corrosion thickness of the main plate, the design formulas for an equivalent plate thickness were developed, and a hybrid design system using these formulas was suggested for the slender doubler plate of a ship structure subjected to a longitudinal in-plane compression load. By using this developed design system, a more rational doubler plate design can be expected considering the efficient reinforcement of the plate members of ship structures. Additionally, a more detailed structural analysis through local strength evaluations will be performed to verify the efficiency of the optimum structural design for the doubler plate.
Keywords
Doubler plate design;Structural analysis;Optimum structural design;Hybrid structural design system;In-plane compression;Equivalent plate thickness;
Language
Korean
Cited by
1.
Development of Ship Plate Member Design System Reinforced by Doubler Plate Subjected to Biaxial In-plane Compressive Load, Journal of Ocean Engineering and Technology, 2016, 30, 4, 294
References
1.
Ham, J.H., 1997. A Study for Rationalization of Lifting Lug Design of Ship Block. Journal of Ocean Engineering and Technology, 11(4), 249-262.

2.
Ham, J.H., 1999. Strength Evaluation of Doubler Plate of Ship Structure subjected to the Longitudinal In-plane Compression. Proceedings of the Annual Autumn Meeting, the Society of Naval Architects of Korea, 471-474.

3.
Ham, J.H., 2001a. Strength Evaluation of Doubler Plate of Ship Structure subjected to Biaxial In-plane Compression and Shear Load. Journal of Ocean Engineering and Technology, 15(1), 85-91.

4.
Ham, J.H., 2001b. Development of the Design System for the Lifting Lug Structure. Journal of the Society of Naval Architects of Korea, 38(1), 86-98.

5.
Ham, J.H., 2008. Consideration of the Structural Strength of High Speed Aluminum Planning Boat Plate Member. Journal of Ocean Engineering and Technology, 22(2), 91-98.

6.
Ham, J.H., Kim, U.N., 1997. The Development of Advanced Buckling Strength Estimation System. Journal of the Society of Naval Architects of Korea, 34(3), 53-60.

7.
Jastrrzebski T., Kimiecik M., 1986. Statistical Investigations of the Deformations of Ship Plates (in France). Bulletin de I'Association Technique Maritime et Aeronautique, 86, 235-345.

8.
Kim, O.H., Kim, J.J., 1998. Reliability Assessment of Ship Longitudinal Strength for the Rational Ship Structural Design. Journal of Ocean Engineering and Technology, 12(4), 8-15.

9.
Korea Register of Shipping(KR), 1999. Internal Regulation of KR Inspection, Regulation of Inspection 30211, 3-2-12 (Rev. 32. 37)-3-2-19.

10.
Lasdon, L.S., Waren, A.D., 1978. Generalized Reduced Gradient Software for Linearly and Nonlinearly Constrained Problems. in : Greenberg, H.J. (Ed.) Design and Implementation of Optimization Software, Sijthoff and Noordhoff, Holland, 335-362.

11.
Paik J.K., Ham J.H., Kim U.N., 1992a. A New Plate Buckling Design Formula. Jounal of the Society of Naval Architects of Japan, 171, 559-566.

12.
Paik J.K., Ham J.H., Ko J.Y., 1992b. A New Plate Buckling Design Formula(2nd Report)-On the Plasticity Correction. Journal of the Society of Naval Architects of Japan, 172, 417-425.