The results of the analysis and evaluation of the impact load water at a height of 11 cm and 22 cm from the surface of the water presented in the form of the curve (see Figure 4-7) and Table 5-6. Measurement data presented is the model scale value.
Table 1. Water impact force on the model to the height of 11 cm
No
|
Landing Angle (deg)
|
Model
Speed
(m/s)
|
Water Impact Forces of Model
|
||||
F-1
(gr/cm2)
|
F-4
(gr/cm2)
|
F-6
(gr/cm2)
|
F-7
(gr/cm2)
|
F-8
(gr/cm2)
|
|||
1
|
0
|
0
|
14.80
|
8.54
|
3.33
|
4.41
|
5.48
|
2
|
0
|
3.89
|
33.74
|
37.25
|
20.85
|
20.85
|
33.75
|
3
|
4.86
|
71.38
|
63.01
|
65.42
|
60.77
|
74.24
|
|
4
|
5.83
|
32.91
|
46.43
|
74.46
|
74.46
|
56.65
|
|
5
|
6.89
|
15.65
|
16.40
|
27.69
|
27.69
|
19.23
|
|
6
|
5
|
3.89
|
42.82
|
7.22
|
11.61
|
11.61
|
21.75
|
7
|
4.86
|
88.41
|
90.56
|
46.42
|
88.96
|
85.29
|
|
8
|
5.83
|
64.88
|
-
|
36.75
|
77.74
|
57.52
|
|
9
|
6.89
|
68.75
|
80.67
|
44.28
|
-
|
91.63
|
|
Table 2. Water impact force on the model to the height of 22 cm
No
|
Landing Angle
(deg)
|
Model
Speed
(m/s)
|
Water Impact Forces of Model
|
||||
F-1
(gr/cm2)
|
F-4
(gr/cm2)
|
F-6
(gr/cm2)
|
F-7
(gr/cm2)
|
F-8
(gr/cm2)
|
|||
1
|
0
|
0
|
15.28
|
7.15
|
16.43
|
3.79
|
50.05
|
2
|
0
|
3.89
|
35.93
|
43.56
|
9.50
|
29.93
|
10.82
|
3
|
4.86
|
29.97
|
32.18
|
90.64
|
18.56
|
7.33
|
|
4
|
5.83
|
24.10
|
11.44
|
17.52
|
14.54
|
12.29
|
|
5
|
6.89
|
21.98
|
28.97
|
18.42
|
32.11
|
28.75
|
|
6
|
5
|
3.89
|
14.74
|
7.35
|
11.71
|
12.24
|
14.85
|
7
|
4.86
|
6.92
|
7.73
|
31.91
|
24.76
|
8.11
|
|
8
|
5.83
|
17.74
|
65.02
|
10.02
|
27.35
|
43.45
|
|
9
|
6.89
|
29.00
|
22.78
|
11.64
|
-
|
-
|
|
In the table also shows the difference adana pressure (but not significant) in some testing and it disebakan due to the influence of surface water waves perturbed towing tank at the time of measurement.
Thus, the data above can be used as a reference in the calculation of material life time and the strength of the material used in the prototype design WISE-8.
