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TABLE OF CONTENTS

1. INTRODUCTION ......................................................................................................... 3

2. MATERIAL PROPERTIES ........................................................................................... 3

2.1. Allowable Stress .................................................................................................. 3

3. MODEL DESCRIPTION ............................................................................................... 4

3.1. Simplified Model .................................................................................................. 4

4. LOADS & FIXTURES ................................................................................................... 5

4.1. Load .................................................................................................................... 5

4.2. Boundary Condition ............................................................................................. 6

5. MESH .......................................................................................................................... 6

6. RESULT ...................................................................................................................... 7

6.1. Load Case 1 : 0 Degree ...................................................................................... 7

6.2. Load Case 2 : 30 Degree to Port ......................................................................... 8

6.3. Load Case 3 : 30 Degree to Stbd ........................................................................ 9

7. CONCLUSION ........................................................................................................... 10

APPENDICES ..................................................................................................................... 11

APPENDIX A : Arrangement Drawing ........................... Error! Bookmark not defined.

APPENDIX B : Detail Design Drawing .......................... Error! Bookmark not defined.

APPENDIX C : Underdeck Strengthening ..................... Error! Bookmark not defined.

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1. INTRODUCTION

This report summarized the stress analysis results conducted on the deck and bollard

structure using finite element method (FEM).

2. MATERIAL PROPERTIES

All material property used in the analysis are as follows:

Material Grade ABS - A

Yield Strength 235 MPa (Min.)

Tensile Strength 400-520 Mpa

Elastic Modulus 199,950 MPa

Poissons Ratio 0.2

Density 7862 kg/m3

Table 1: Material Properties

2.1. Allowable Stress

The stress profile on the structure is compared with the reference material ABS Grade A,

which has yield point of 235 MPa. Since the analysis is a linear static problem, the

obtained stress from analysis can be made comparison directly to the yield stress. The

structure is deemed to have tendency to overstress should the stress profile exceeds the

yield point of material.

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3. MODEL DESCRIPTION

3.1. Simplified Model

Figure 1: Bollard Design

Figure 2: Underdeck Structures Design

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4. LOADS & FIXTURES

4.1. Load

SWL = 30t

Load Applied = 2 x SWL = 60t = 588 399 N

Load Direction : LC 1 = 0 Degree

LC 2 = 30 Degree Port

LC 3 = 30 Degree Stbd

Load Position = 1.2*D from top of base plate

= 1.2 x (355.6 mm)

= 427 mm

Figure 3: Load Direction & Position

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4.2. Boundary Condition

Model are fixed at the transom and FR. -2 as shown in the figure below.

Figure 4: Boundary Condition

5. MESH

Type = Solid Mesh (Curvature based Mesh)

Jacobian Points = 4 Points

Element Size = 100mm (Max) , 10mm (Min)

Figure 5: Meshing

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6. RESULT

6.1. Load Case 1 : 0 Degree

Figure 6: Max Von Mises : 177 Mpa (Bollard View)

Figure 7: Max Von Mises : 177 Mpa (Underdeck View)

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6.2. Load Case 2 : 30 Degree to Port

Figure 8: Max Von Mises : 185 Mpa (Bollard View)

Figure 9: Max Von Mises : 185 Mpa (Underdeck View)

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6.3. Load Case 3 : 30 Degree to Stbd

Figure 10: Max Von Mises : 182 Mpa (Bollard View)

Figure 11: Max Von Mises : 182 Mpa (Underdeck View)

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7. CONCLUSION

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APPENDICES

1. INTRODUCTION2. MATERIAL PROPERTIES2.1. Allowable Stress

3. MODEL DESCRIPTION3.1. Simplified Model

4. LOADS & FIXTURES4.1. Load4.2. Boundary Condition

5. MESH6. RESULT6.1. Load Case 1 : 0 Degree6.2. Load Case 2 : 30 Degree to Port6.3. Load Case 3 : 30 Degree to Stbd

7. CONCLUSIONAPPENDICES