PSI - Issue 33

Muhammad Sabiqulkhair Akbar et al. / Procedia Structural Integrity 33 (2021) 67–74 Akbar et al. / Structural Integrity Procedia 00 (2019) 000–000

70 4

3. Result and Discussion 3.1. Displacement ratio

The displacement ratio is the result of the displacement analysis value divided by the displacement benchmark value (displayed in Table 4). The displacement ratio of the first variation midship simulation is 1.711. In the second variation, the displacement ratio is 1.556. In the third variation, the displacement ratio is 1.514. The fourth variation of the total displacement ratio is 1.325. The fifth variation has a displacement ratio of 1.294. The sixth variation has a deformation of 0.868. In the last variation, the displacement ratio is 0.846. An illustration of the displacement contours on the model is presented in Fig. 2.

Table 4. Displacement ratio of the midship analysis. ELT Ratios Nodes

Elements

Δ x (mm)

Benchmark Δ x (mm)

Ratio Δ x

5 6 7 8 9

138521 93057 74016 56612 46044 36946 28757

70667 47686 38009 29184 23890 19191 15065

47.67 43.37 42.17 36.92 36.06 26.94 20.96

27.86 27.86 27.86 27.86 27.86 27.86 27.86

1.711 1.556 1.514 1.325 1.294

10 11

0.97

0.752

(a)

(b)

(c) Fig. 2. (a) Displacement of the ELT ratio 8; (b) displacement of the ELT ratio 9; and (c) displacement of the ELT ratio 10.

The result from the simulation of displacement ratio represent graphically in Fig. 3, it can be seen that the larger the ELT ratios, the more convergence will be to the benchmarking study. As seen in the graph, the value starts to approach convergence when the ELT value is 8. The closest displacement ratio results when the ELT value is 10 with a ratio of 0.97, the nodes is 36946, the elements are 19191, and the error is 3 percent compared to the displacement value of benchmarking study.