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1

Virtual Test of Ship Speed Rapid Prediction

2

Ship Steady Wave-making Virtual Test

3

Ship Resistance Virtual Test

4

Virtual Test of Open-water Propeller

5

Virtual Test of Ship Model Self-propulsion

6

Rapid Virtual Test of Propeller Cavitation Induced Exciting Force

7

Fine Virtual Test of Propeller Cavitation Induced Exciting Force

8

Virtual Test of Ship Added Resistance

9

Virtual Test of Ship Green-water and Slamming

10

Virtual Test of Ship Motions in Waves

11

Ship Roll Damping Virtual Test

12

Maneuverability Virtual Test of Parent Ship Database

13

Virtual Test of Rapid Self-propelled Model

14

Virtual Test of Constraint Model and Self -propulsion Model

15

Virtual Test of Large Scale Ocean Environment

16

Virtual Test of Mesoscale Marine Environment

17

Small Scale Ocean Environment Virtual Test

18

Virtual Test of Platform Motion in Operation Sea State

19

Virtual Test of Offshore Platform Motion under Extreme Sea State

20

Virtual Test of Platform Free Attenuation in Calm Water

21

Platform Wind Load / Flow Load Virtual Test

22

Vortex Induced Motion Virtual Test

23

Fine Virtual Test of Vortex Induced Vibration

24

Rapid Virtual Test of Vortex Induced Vibration
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Test type

Virtual Experiment Calculation Module of Ship Motion

add date£º29/07/2017    hits£º


Test flow
According to the value of hull geometry modeling, such as modeling of bilge keel;
• establish flow models (air-water two-phase flow, turbulence models, etc.);
Creating watershed grids;
• determine initial values and boundary conditions for forced roll motion of the hull;
Setting dynamic mesh technology, determining pressure, speed, coupling algorithm, spatial discretization scheme, etc.;
Perform calculations to obtain forced roll hydrodynamic moments;
To obtain the damping coefficient of the rolling force, and obtain the viscous damping contribution after the potential flow and wave damping separation;


 
Functional and algorithm requirements
- contains the bilge keel, for wood, fixed fin viscous flow simulation function;
• has simulated zero speed and forced roll motion at speed;
• the forced rolling amplitude can reach 30-40 degrees for container ships, and the dynamic stability assessment is required to estimate the roll damping;
• turbulence models should include two equations k- epsilon (Standard, RNG, realizable) and k- omega (Standard, SST) models with near wall function processing functions;
• pressure velocity coupling should include the SIMPLE algorithm, and convection interpolation uses the two order upwind scheme;
In order to adapt to the roll motion of ships, the moving mesh technique is adopted, which includes slip, spring stretch and reconstruction, and the moving mesh technique of river basin;
After forced roll simulation, the rolling hydrodynamic moment is required, and the hydrostatic force is removed in the result.

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