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BV HYDROSTAR TRAINING Mesh Generation

Deepwater Technology Research Centre

Binbin Li

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REFERENCE SYSTEM

AP FP

z

x

x

o

yPortside

Starboard

ZFSURFACE(Default=0)

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REFERENCE SYSTEM

►Wave heading definition180° head sea

0° following sea

90°/270° beam sea

Relative Wave Heading!!!

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REFERENCE SYSTEM

►Geometrical Symmetry

0 symmetry 1 symmetry

2 symmetry

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REFERENCE SYSTEM

► Flat panel of the mesh representing the wetted part of hull

n1

n2

n3

n4

n

n1

n2

n3

Quadrilateral panel Triangular panel

*** The normal vector is oriented towards fluid.

n

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TOOL: Automatic Mesh Generator (AMG)

HSTAR MODULE: HSMSH

INPUT FILES: mesh.hul & mesh.mri

sections

Fore Part

Aft Part

MESH

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HSTAR MODULE: HSMSH

Creation of HydroSTAR Mesh: mesh.hst

MESH

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WINDOWS VERSION

MESH

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► HUL:

Number of sections

Number of points & y, z coordinates for each section

► MRI:

HUL file name

Not enough section in fore part

Draught problem

Trim/Heel problem

2 points adjustment

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Typical input

HUL FileMRI File

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Typical output

HST File

Nodes

Panels

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DRAUGHT:14m TRIM:0

MESH-Single body

DRAUGHT:5m TRIM:0

DRAUGHT:5m TRIM:-1degree

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Possibilities

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MESH-Multi-hull

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Vessel1.tnk

MESH-Multi-body

Vessel2.tnk

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Swath

Swath

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Barge

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Wigley

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Offshore

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Examples

Examples 1Tanker shape FPSO

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Example 1 – AMG for FPSO

► .hull file

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Example 1 – AMG for FPSO

► .mri file

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Example 1 – AMG for FPSO

► .hst file

hsmsh –ship vlcc

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Example 1 – AMG for FPSO

hslec vlcc.hst

Hschk

hview or hvisu

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Examples

Examples 2SEMI-SUBMERSIBLE

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Example 2 – SMG for SEMI

Data file .don (part 1)

1

2

4

3

5

6

8

7

910

12

11

1314

16

15

17

20

18

19

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Example 2 – SMG for SEMI

Data file .don (part 2)

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Example 2 – SMG for SEMI

.hst file

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Examples

Examples 3TRUSS SPAR

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Example 3 – Hybrid model for SPAR

.don file

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Example 3 – Hybrid model for SPAR

Original .hst file

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Example 3 – Hybrid model for SPAR

Modified .hst file Extra points for truss structure!

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Example 3 – Hybrid model for SPAR

Modified .hst file

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Examples

Examples 4Mesh cut

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Examples