PSI - Issue 27

Aknaf Sam Dabit et al. / Procedia Structural Integrity 27 (2020) 163–170 Dabit et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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3.2. Loading definition Loading in this simulation uses static loading with uniform distribution. The load is applied to the hull area, assuming the overall weight of the boat moving components with a load of 1.8 kg or 17.65 N. This load is given to the lower back hull area. The other loading is given to the fish feed tank area with a feed capacity of ± 8 kg, so to determine changes in the shape of the fish feed tank given a load made loading variations between 2 kg, 4 kg, 6 kg, and 8 kg. Laying a static load on the hull will be shown in Fig. 3.

Fig. 3. Static loading on the catamaran hull.

3.3. Fixed geometry

Fixed Geometry is a part of a part that is made fixed before laying a load on a section that will be analyzed in software. Fixed Geometry is fundamental so that the load given to a part that is analyzed or simulated is working optimally, and the parts do not change position during the loading simulation. Fixed Geometry is placed on the right and left sides of the hull, assuming that in this section, the most significant vessel resistance because it has a broader surface area than the back and front. Fixed Geometry during simulation with software is shown with green arrows. Fixed Geometry will be shown in Fig. 4.

Fig. 4. Applied constraint on the idealized geometry.

3.4. Material and meshing The material on the body of the boat as a whole uses plywood with reinforced resin. However, in the simulation, it is defined as the balsa wood material that has almost the same characteristics as plywood. The features of balsa wood that are known from the software will be shown in Table 1.