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50. Assessment of Designed Midship Section Structures subjected to the Hydrostatic and Hydrodynamic Loads: A Convergence Study

Author

Muhammad Sabiqulkhair Akbar, Dominicus Danardono Dwi Prija Tjahjana, Seung Jung Baek, Fajar Budi Laksono, and Aditya Rio Prabowo

Subjects
Stress (mechanics), Scale (ratio), business.industry, Convergence (routing), Calibration, Range (statistics), Boundary value problem, Structural engineering, business, Finite element method, Displacement (vector), Earth-Surface Processes, Mathematics
Abstract

This paper discusses the effect of element-length-to-thickness (ELT) ratio on midship structure analysis. Although it is widely known that every design must consider the best possible outcome of the design, indeed the simulation cannot produce the optimal analysis due to a variety of factors. During the study of the midship section configuration, the ELT ratio is one of the determining factors in the simulation. Since different ELT ratios would eventually produce different results, a calibration using the finite element method based on pioneer benchmarking studies is needed. The author designed a midship section using SolidWorks and ran the finite element analysis. The applied material is a titanium alloy, and the design’s boundary conditions are described as static loads, dynamic loads, and ELT ratios (in the range of 5-11). The midship design was tested with various ELT ratios, and the results, i.e., displacement, stress (von-Mises), and strain, were summarized. In terms of convergence tendency, midship displayed a displacement of 26.94 mm for the ELT ratio 10, with a strain of 5.579 × 10-4 and stress of 111.2 MPa. The displacement ratio was 0.97, the strain ratio was 0.917, and the stress ratio was 0.778 according to the simulation result. Different results can be presented by using different ELT ratios to assess the convergence tendency of the applied ELT ratios in finite element simulation. In contrast to the pioneer study, the ELT ratio converges on a scale of 10 with an average disparity of 11.16%.

Published
2021

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